云台
云台，也称PTZ，是指对摄像机进行操控，比如云台转动、物理缩放、变焦等操作。 可以根据需要自动或手动调整方向和焦距，确保关键区域始终处于监控范围内。 该能力需摄像头本身支持PTZ能力。
云台控制
请先确认设备是否具备云台能力，可通过EZDeviceInfo的isSupportPTZ方法判断。
如果设备支持云台能力，基线（线上）客户推荐使用如下方法来控制云台
EZOpenSDK
/**
* PTZ 通过p2p服务+http双通道控制云台，设备响应先到达的指令，响应更快（推荐）
* 该接口为耗时操作，必须在线程中调用
*
* @param deviceSerial 设备序列号
* @param cameraNo 通道号
* @param command ptz控制命令
* @param action 控制启动/停止
* @param newSpeed 速度（0-7）
* @return 操作成功或者失败(返回失败错误码)
*/
public boolean controlPTZMix(final String deviceSerial, final int cameraNo, final EZPTZCommand command, final EZPTZAction action, final int newSpeed) throws BaseException;
私有云客户推荐使用如下方法来控制云台（使用基础能力，私有云服务可能未支持其他扩展功能）
/**
* PTZ 控制接口
* 该接口为耗时操作，必须在线程中调用
*
* @param deviceSerial 设备序列号
* @param cameraNo 通道号
* @param command ptz控制命令
* @param action 控制启动/停止
* @param speed 速度（0-2）
* @return 操作成功或者失败(返回失败错误码)
*/
public boolean controlPTZ(String deviceSerial, int cameraNo, EZPTZCommand command, EZPTZAction action, int speed) throws BaseException;
云台角度
播放器EZPlayer设置handler通知回调后，会回调云台角度数据
@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case EZRealPlayConstants.MSG_PTZ_GET_SUCCESS:// 云台角度获取成功
handleDevicePtzAngleInfo(msg.obj);
break;
}
}
/**
* 云台角度比例尺更新
* @param obj
*/
private void handleDevicePtzAngleInfo (Object obj) {
if (mPtzControlAngleViewHor.getVisibility() == View.VISIBLE || mPtzControlAngleViewVer.getVisibility() == View.VISIBLE) {
EZDevicePtzAngleInfo info = (EZDevicePtzAngleInfo) obj;
// do something
}
}
EZDevicePtzAngleInfo对象属性如下
属性 释义
horStartAng 水平方向起点角度
horEndAng 水平方向终点角度
horCurAng 水平方向当前角度
verStartAng 垂直方向起点角度
verEndAng 垂直方向终点角度
verCurAng 垂直方向当前角度 。依据上述开发文档在下面代码中实现点击"@+id/ptz_left_btn"控制云台向左转动，点击"@+id/ptz_right_btn"控制云台向右转动，点击"@+id/ptz_top_btn"控制云台向上转动，点击"@+id/ptz_bottom_btn"控制云台向下转动，点击"@+id/zoom_add"控制云台物理放大，点击"@+id/zoom_reduce"控制云台物理缩小，其它不变。MainActivity.java:package com.videogo.ui.login;
import
android.content.res.Configuration;
import
android.content.pm.ActivityInfo;
import
android.os.Bundle;
import
android.os.Handler;
import
android.os.Message;
import
android.util.Log;
import
android.view.SurfaceHolder;
import
android.view.SurfaceView;
import
android.view.View;
import
androidx.annotation.NonNull;
import
androidx.appcompat.app.AppCompatActivity;
import com.videogo.exception.BaseException;
import com.videogo.exception.ErrorCode;
import com.videogo.openapi.EZConstants;
import com.videogo.openapi.EZOpenSDK;
import com.videogo.openapi.EZPlayer;
import ezviz.ezopensdk.R;
import
android.widget.ProgressBar;
import
android.widget.
RelativeLayout;
import
android.widget.
LinearLayout;
import
android.widget.ImageButton;
public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback, Handler.Callback {
private static final String TAG = "EZPreview";
private static final int MSG_VIDEO_SIZE_CHANGED = 1;
private static final int MSG_REALPLAY_PLAY_SUCCESS = 2001;
private static final int MSG_REALPLAY_PLAY_FAIL = 2002;
// 接收的参数键
private static final String KEY_APPKEY = "appkey";
private static final String KEY_SERIAL = "serial";
private static final String KEY_VERIFYCODE = "VerifyCode";
private static final String KEY_ACCESSTOKEN = "accessToken";
private static final String KEY_CAMERANO = "cameraNo";
private boolean mIsPlaying = false;
private EZPlayer mEZPlayer;
private SurfaceView mSurfaceView;
private SurfaceHolder mSurfaceHolder;
private ProgressBar mLiveProgressBar;
private
RelativeLayout mRlControl;
private
LinearLayout mLlHc;
private ImageButton mIbRotate2;
// 从Intent中获取的参数
private String mAppKey;
private String mDeviceSerial;
private String mVerifyCode;
private String mAccessToken;
private int mCameraNo = 0; // 默认通道号0
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activitymain);
// 1. 从Intent中获取参数
extractParametersFromIntent();
// 2. 初始化UI
initUI();
initOrientationSensitiveViews();
View fanHui = findViewById(R.id.back);
fanHui.setOnClickListener(v -> finish());
// 3. 初始化SDK并创建播放器
initSDKAndCreatePlayer();
}
private void initOrientationSensitiveViews() {
mLiveProgressBar = findViewById(R.id.liveProgressBar);
mRlControl = findViewById(R.id.rl_control);
mLlHc = findViewById(R.id.ll_hc);
mIbRotate2 = findViewById(R.id.ib_rotate2);
// 初始状态显示加载
if (mLiveProgressBar != null) {
mLiveProgressBar.setVisibility(View.VISIBLE);
}
// 初始根据方向更新UI
updateLayoutByOrientation();
}
@Override
public void onConfigurationChanged(@NonNull Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// 方向变化时重新初始化视图
initOrientationSensitiveViews();
updateLayoutByOrientation();
}
@Override
protected void onResume() {
super.onResume();
if (mLiveProgressBar != null) {
if (mIsPlaying) {
mLiveProgressBar.setVisibility(View.GONE);
} else {
mLiveProgressBar.setVisibility(View.VISIBLE);
}
}
}
private void updateLayoutByOrientation() {
int orientation = getResources().getConfiguration().orientation;
if (orientation == Configuration.ORIENTATION_PORTRAIT) {
// 竖屏模式
mRlControl.setVisibility(View.VISIBLE);
mLlHc.setVisibility(View.GONE);
mIbRotate2.setVisibility(View.GONE);
} else {
// 横屏模式
mRlControl.setVisibility(View.GONE);
mLlHc.setVisibility(View.VISIBLE);
mIbRotate2.setVisibility(View.VISIBLE);
}
}
/**
* 从Intent中提取传递的参数
*/
private void extractParametersFromIntent() {
Bundle extras = getIntent().getExtras();
if (extras != null) {
mAppKey = extras.getString(KEY_APPKEY, "");
mDeviceSerial = extras.getString(KEY_SERIAL, "");
mVerifyCode = extras.getString(KEY_VERIFYCODE, "");
mAccessToken = extras.getString(KEY_ACCESSTOKEN, "");
mCameraNo = extras.getInt(KEY_CAMERANO, 0);
Log.d(TAG, "Received parameters:");
Log.d(TAG, "AppKey: " + mAppKey);
Log.d(TAG, "DeviceSerial: " + mDeviceSerial);
Log.d(TAG, "VerifyCode: " + mVerifyCode);
Log.d(TAG, "AccessToken: " + mAccessToken);
Log.d(TAG, "CameraNo: " + mCameraNo);
} else {
Log.e(TAG, "No parameters received from intent");
// 如果没有参数，可以显示错误信息并退出
finish();
}
}
/**
* 初始化UI组件
*/
private void initUI() {
mSurfaceView = findViewById(R.id.realplay_sv);
if (mSurfaceView != null) {
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
} else {
Log.e(TAG, "SurfaceView not found with ID realplay_sv");
}
}
/**
* 初始化SDK并创建播放器
*/
private void initSDKAndCreatePlayer() {
try {
// 1. 初始化SDK
EZOpenSDK.initLib(getApplication(), mAppKey);
EZOpenSDK.getInstance().setAccessToken(mAccessToken);
// 2. 创建播放器
createPlayer();
} catch (Exception e) {
Log.e(TAG, "SDK initialization failed", e);
}
}
/**
* 创建播放器并开始播放
*/
private void createPlayer() {
try {
// 1. 创建播放器实例
mEZPlayer = EZOpenSDK.getInstance().createPlayer(mDeviceSerial, mCameraNo);
// 2. 配置播放器
mEZPlayer.setHandler(new Handler(this));
if (mSurfaceHolder != null) {
mEZPlayer.setSurfaceHold(mSurfaceHolder);
}
if (mVerifyCode != null && !mVerifyCode.isEmpty()) {
mEZPlayer.setPlayVerifyCode(mVerifyCode);
}
// 3. 开始播放
mEZPlayer.startRealPlay();
mIsPlaying = true; // 标记为正在播放
} catch (Exception e) {
Log.e(TAG, "Player creation failed", e);
mIsPlaying = false; // 标记为未播放
}
}
// 处理屏幕旋转按钮点击
public void changeScreen(View view) {
Log.d(TAG, "Change screen orientation requested");
int currentOrientation = getResources().getConfiguration().orientation;
if (currentOrientation == Configuration.ORIENTATION_PORTRAIT) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
} else {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
// 更新UI布局
updateLayoutByOrientation();
}
// Surface回调接口实现
@Override
public void surfaceCreated(@NonNull SurfaceHolder holder) {
if (mEZPlayer != null) {
mEZPlayer.setSurfaceHold(holder);
}
}
@Override
public void surfaceChanged(@NonNull SurfaceHolder holder, int format, int width, int height) {}
@Override
public void surfaceDestroyed(@NonNull SurfaceHolder holder) {
if (mEZPlayer != null) {
mEZPlayer.setSurfaceHold(null);
}
}
@Override
protected void onStop() {
super.onStop();
if (mEZPlayer != null) {
mEZPlayer.stopRealPlay();
mIsPlaying = false; // 标记为已停止
}
}
@Override
protected void onDestroy() {
super.onDestroy();
if (mEZPlayer != null) {
mEZPlayer.release();
mEZPlayer = null;
}
}
// Handler回调处理播放状态
@Override
public boolean handleMessage(@NonNull Message msg) {
Log.d(TAG, "handleMessage: " + msg.what);
switch (msg.what) {
case MSG_VIDEO_SIZE_CHANGED:
break;
case MSG_REALPLAY_PLAY_SUCCESS:
Log.i(TAG, "播放成功");
mIsPlaying = true; // 标记为正在播放
runOnUiThread(() -> {
if (mLiveProgressBar != null) {
mLiveProgressBar.setVisibility(View.GONE);
}
});
break;
case MSG_REALPLAY_PLAY_FAIL:
Log.e(TAG, "播放失败");
mIsPlaying = false; // 标记为播放失败
runOnUiThread(() -> {
if (mLiveProgressBar != null) {
mLiveProgressBar.setVisibility(View.VISIBLE);
}
});
BaseException error = (BaseException) msg.obj;
int errorCode = error.getErrorCode();
if (errorCode == ErrorCode.ERROR_INNER_VERIFYCODE_NEED ||
errorCode == ErrorCode.ERROR_INNER_VERIFYCODE_ERROR) {
// 处理验证码错误
// 这里应该提示用户输入验证码，然后重新设置并播放
// 示例中暂时保留模拟输入验证码
mVerifyCode = "123456";
if (mEZPlayer != null) {
mEZPlayer.setPlayVerifyCode(mVerifyCode);
mEZPlayer.startRealPlay();
}
} else {
Log.e(TAG, "播放失败，错误码: " + errorCode);
}
break;
}
return true;
}
}
activitymain.xml:<?xml version="1.0" encoding="utf-8"?>
<
RelativeLayout xmlns:
android="http://schemas.
android.com/apk/res/
android"
xmlns:tools="http://schemas.
android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#fff2f2f2"
tools:context="com.videogo.ui.login.MainActivity">
<
RelativeLayout
android:id="@+id/ra_title"
android:layout_width="match_parent"
android:layout_height="44dp"
android:background="@mipmap/title_bg">
<TextView
android:id="@+id/titlename"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_gravity="center"
android:text="易丰视频监控"
android:textColor="@
android:color/white"
android:textSize="18sp" />
<ImageButton
android:id="@+id/back"
android:layout_width="40dp"
android:layout_height="match_parent"
android:background="@null"
android:contentDescription="@null"
android:paddingLeft="10dp"
android:src="@mipmap/img_back" />
<ImageButton
android:id="@+id/ib_rotate"
android:layout_width="50dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:contentDescription="@null"
android:onClick="changeScreen"
android:layout_marginRight="6dp"
android:scaleType="centerInside"
android:background="@drawable/gps_select"
android:src="@mipmap/ic_size_sel" />
</
RelativeLayout>
<
RelativeLayout
android:id="@+id/rl_control"
android:layout_width="match_parent"
android:layout_height="266dp"
android:layout_alignParentBottom="true"
android:visibility="visible">
<
LinearLayout
android:id="@+id/ll_center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_centerHorizontal="true"
android:background="@mipmap/ycjk_yp"
android:orientation="vertical">
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb1" />
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb2" />
<ImageButton
android:id="@+id/left_up"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@null"
android:visibility="gone" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb3" />
</
LinearLayout>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb4" />
</
LinearLayout>
<ImageButton
android:id="@+id/ptz_top_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/nnew_video_up" />
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb1" />
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb3" />
<ImageButton
android:id="@+id/right_up"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@null"
android:visibility="gone" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb2" />
</
LinearLayout>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb4" />
</
LinearLayout>
</
LinearLayout>
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent">
<ImageButton
android:id="@+id/ptz_left_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/nnew_video_left" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_zj" />
<ImageButton
android:id="@+id/ptz_right_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/nnew_video_right" />
</
LinearLayout>
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb4" />
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb2" />
<ImageButton
android:id="@+id/left_down"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@null"
android:visibility="gone" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb3" />
</
LinearLayout>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb1" />
</
LinearLayout>
<ImageButton
android:id="@+id/ptz_bottom_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/nnew_video_down" />
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb4" />
<
LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb3" />
<ImageButton
android:id="@+id/right_down"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@null"
android:visibility="gone" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb2" />
</
LinearLayout>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ycjk_kb1" />
</
LinearLayout>
</
LinearLayout>
</
LinearLayout>
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toLeftOf="@id/ll_center"
android:gravity="center"
android:orientation="vertical">
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageButton
android:id="@+id/focus_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="焦距 +"
android:textColor="@color/black"
android:textSize="16dp" />
</
LinearLayout>
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageButton
android:id="@+id/guangquan_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more3" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="光圈 +"
android:textColor="@color/black"
android:textSize="16dp" />
</
LinearLayout>
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageButton
android:id="@+id/zoom_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more5" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="变倍 +"
android:textColor="@color/black"
android:textSize="16dp" />
</
LinearLayout>
</
LinearLayout>
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_toRightOf="@id/ll_center"
android:gravity="center"
android:orientation="vertical">
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageButton
android:id="@+id/foucus_reduce"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more2" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="焦距 -"
android:textColor="@color/black"
android:textSize="16dp" />
</
LinearLayout>
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageButton
android:id="@+id/guangquan_reduce"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more4" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="光圈 -"
android:textColor="@color/black"
android:textSize="16dp" />
</
LinearLayout>
<
LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical">
<ImageButton
android:id="@+id/zoom_reduce"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more6" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="变倍 -"
android:textColor="@color/black"
android:textSize="16dp" />
</
LinearLayout>
</
LinearLayout>
</
RelativeLayout>
<
RelativeLayout
android:layout_above="@id/rl_control"
android:layout_below="@id/ra_title"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<SurfaceView
android:id="@+id/realplay_sv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@
android:color/transparent" />
<ImageButton
android:id="@+id/ib_rotate2"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentLeft="true"
android:layout_marginLeft="3dp"
android:background="@color/green"
android:contentDescription="@null"
android:onClick="changeScreen"
android:visibility="gone"
android:src="@mipmap/img_systems_close" />
<ProgressBar
android:id="@+id/liveProgressBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="visible" />
<
LinearLayout
android:id="@+id/ll_hc"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:visibility="gone">
<
LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_weight="1" >
<ImageButton
android:id="@+id/ptz_top_btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/h_up" />
</
LinearLayout>
<
LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_weight="1" >
<ImageButton
android:id="@+id/ptz_bottom_btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/h_down" />
</
LinearLayout>
<
LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_weight="1" >
<ImageButton
android:id="@+id/ptz_left_btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/h_left" />
</
LinearLayout>
<
LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_weight="1" >
<ImageButton
android:id="@+id/ptz_right_btn2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/h_right" />
</
LinearLayout>
<
LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_weight="1" >
<ImageButton
android:id="@+id/focus_add2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more1" />
</
LinearLayout>
<
LinearLayout
android:gravity="center"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" >
<ImageButton
android:id="@+id/foucus_reduce2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more2" />
</
LinearLayout>
<
LinearLayout
android:gravity="center"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" >
<ImageButton
android:id="@+id/zoom_add2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more5" />
</
LinearLayout>
<
LinearLayout
android:gravity="center"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1" >
<ImageButton
android:id="@+id/zoom_reduce2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/video_more6" />
</
LinearLayout>
</
LinearLayout>
</
RelativeLayout>
</
RelativeLayout>
本文介绍了Android开发中两种常见的布局方式：线性布局（LinearLayout）和相对布局（RelativeLayout）。线性布局支持水平或垂直方向排列子控件，而相对布局则允许子控件根据父控件或其他兄弟控件进行定位。
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