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原创 android studio 两个app的Activity之间的传递数据

第一个APP中，我们创建一个按钮，并且在点击事件中创建Intent，并设置Action和type，并添加onActivityResult()来接收我们从第二个应用中返回的数据：我们创建第二个APP中，并且在清单文件中进行配置Intent-filter：<activity android:name=".ShareLocationActivity"> <in...

2019-09-04 15:40:53 1930

原创 Caused by: android.system.ErrnoException: open failed: ENOENT (No such file or directory)

调用摄像头出现了 “相机打开失败，请检查权限”查出的原因是其它地方已经调用了摄像头，没有进行释放，所以在这里调用摄像头就用不了在其它用到的地方如图：这样就可以解决所遇到的问题了...

2019-08-29 11:45:34 2959

原创 Program type already present: okio.AsyncTimeout$1

Program type already present: okio.AsyncTimeout$1Message{kind=ERROR, text=Program type already present: okio.AsyncTimeout$1, sources=[Unknown source file], tool name=Optional.of(D8)}我的解决方法：在app中的...

2019-07-18 17:17:54 940

原创 android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@

报错：android.view.WindowManager$BadTokenException: Unable to add window android.view.ViewRootImpl$W@ce1c62d -- permission denied for window type 2010我找了好久才找到的报错的原因竟然是少加一个权限：<uses-permi...

2019-07-10 11:15:53 10021 2

原创 keytool -list -v -keystore C:\Users\Administrator\.android\debug.keystore 'keytool ' 不是内部或外部命……

keytool -list -v -keystore C:\Users\Administrator\.android\debug.keystore'keytool' 不是内部或外部命令，也不是可运行的程序或批处理文件。jdk location:口令：android...

2019-07-02 10:54:23 1398

原创 Caused by: java.lang.ClassNotFoundException: Didn't find class "okio.Sink" on path:

报错：Caused by: java.lang.ClassNotFoundException: Didn't find class "okio.Sink" on path: DexPathList[[zip file "/data/app/com.unionbroad.app-W-xVWedfOe4VcloyCXMFeA==/base.apk"],nativeLibraryDirectories...

2019-06-27 15:36:04 1686

原创 java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerExceptio

java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerExceptio报错的解决方法：增加一个implementation 'com.android.support:support-v4:28.0.0'就没有问题了...

2019-06-15 09:56:46 6931 2

原创自定义View通过手势滑动实现了上下左右移动与缩放以及长按的功能

package gbpe.policeass.view;import android.content.Context;import android.util.AttributeSet;import android.view.GestureDetector;import android.view.MotionEvent;import android.view.View;import ...

2019-06-14 08:59:47 838

原创 Android使用ToggleButton实现开关按钮功能

布局：<ToggleButton android:id="@+id/tb_record" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_ce...

2019-06-03 17:17:11 753

原创 SeekBar实现播放器进度条的功能

<SeekBar android:id="@+id/seekbar" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:layout_weight="1" androi...

2019-05-23 09:58:55 1638

原创 Installation failed with message INSTALL_FAILED_SHARED_USER_INCOMPATIBLE.

弹出：Installation failed with message INSTALL_FAILED_SHARED_USER_INCOMPATIBLE.It is possible that this issue is resolved by uninstalling an existing version of the apk if it is present, and then re-...

2019-05-05 15:55:17 560

原创 java.io.FileNotFoundException: This file can not be opened as a file descriptor; it is probably ...

报错：java.io.FileNotFoundException:This file can not be opened as a file descriptor; it is probably compressed原代码报错地方是：红箭头是报错的地方，修改异常处理的办法如下：最后运行项目无异常了...

2019-04-16 10:04:50 2022

原创 java.lang.RuntimeException: autoFocus failed

我报错：java.lang.RuntimeException: autoFocus failed的解决办法是重写了AutoFocusManager类import android.content.Context;import android.content.SharedPreferences;import android.hardware.Camera;import android....

2019-04-12 16:11:43 3794

原创 java.lang.RuntimeException: Camera is being used after Camera.release() was called

报错： java.lang.RuntimeException: Camera is being used after Camera.release() was called解决办法是：在camera.startPreview();这之前加上autoFocusManager = new AutoFocusManager(camera,mCameraPreviewCallback );...

2019-04-09 13:56:53 2457

原创 Caused by: android.content.res.Resources$NotFoundException

报错： Caused by: android.content.res.Resources$NotFoundException: File res/raw/siren2.WAV from drawable resource ID #0x7f0d0003解决办法是：这样就没有问题了

2019-04-01 08:57:10 2130 1

原创短按SOS键实现开始与停止白光LED灯闪烁状态

int mInt=0;Timer mTimer;TimerTask mTimerTask;/** 开始白光LED灯报警灯闪烁状态*/private void SOS() { mTimerTask = new TimerTask() { @Override public void run() { Message messag...

2019-03-28 15:40:35 1252

原创 java.lang.UnsatisfiedLinkError: No implementation found for int com.guobao.lightboard.HardwareContr

java.lang.UnsatisfiedLinkError: No implementation found for int com.guobao.lightboard.HardwareControler.SetLaserState(int) (tried Java_com_guobao_lightboard_HardwareControler_SetLaserState and Java_c...

2019-03-28 10:09:06 782 1

原创 java.lang.StringIndexOutOfBoundsException:String index out of range : -1

红箭头报出的异常所需要的解决方法： String fileName =""; File file = new File(data); fileName = file.getName(); if(fileName.indexOf(".")!=-1){ ...

2019-03-25 12:01:52 5595

原创自定义Compass继承ImageView实现指南针旋转

/** 自定义一个View继承ImageView，增加一个通用的旋转图片资源的方法***/@SuppressLint("AppCompatCustomView")public class CompassView extends ImageView { private float mDirection;// 方向旋转浮点数 private Drawable co...

2019-03-25 11:36:28 383

原创 not whiteListedcom.tencent.mm/com.tencent.mm.plugin.base.stub.WXEntryActivit

微信登录或微信分享出现这个：not whiteListedcom.tencent.mm/com.tencent.mm.plugin.base.stub.WXEntryActivity是项目的应用签名和包名不一致的原因，改成一致就没有这个问题了...

2018-10-26 17:35:37 8131

原创 android中以文件形式上传图片到后台

private File tuPian1 ;private File tuPian2 ;@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent intent) { String sdStatus = Environment.getExternalStorageState()...

2018-09-22 15:18:46 2371

原创 android不同APP中的activity的传值

当前传递的Activity的值SharedPreferences signature = getSharedPreferences("signature", MODE_WORLD_READABLE|MODE_WORLD_WRITEABLE); signature.edit().putString("uri","视频url").apply();接收传过来的Activity的值:Stri...

2018-09-22 11:53:58 173

原创 android中通过URL来播放背景音乐

private MediaPlayer mediaPlayer;String uri= http://meimeibucket.oss-cn-shanghai.aliyuncs.com/1512565590_86.mp3?OSSAccessKeyId=LTAIhL8GLNt0yDff&Expires=1537590893&Signature=EjC9TM1%2BUkzKScC...

2018-09-22 11:46:57 2339

原创 Android中实现双击点赞动画效果

iv_easy_like.getBackground().setAlpha(0);rlLike.setOnTouchListener(new OnDoubleClickListener(new OnDoubleClickListener.DoubleClickCallback() { @Override public void onDoubleClick() { ...

2018-09-20 14:14:02 1976

原创 Android studio中出现了 Permission is only granted to system app 的问题

解决办法：File ---> Setttings ----> Editor ------> Inspections --------> Android Lint 将 Using system app permission 的Error 改成 Warning 就好了

2018-09-10 10:27:14 981

原创自定义HorizontalScrollView实现左右滑动界面

public class TimeLimitPurchaseScrollView extends HorizontalScrollView implements OnClickListener{ /** * 图片滚动时的回调接口 * * @author zhy * */ public interface CurrentImage...

2018-08-29 14:33:19 1549

原创 Java中Integer[]数组删除指定的值

json数据 : strResult{ "Code": 0, "Data": [{ "Id": 25, "Name": "支付宝", "Logo": "/content/images/yhk24.jpg" }, { "Id": 1, &quot

2018-08-24 11:01:46 2730

原创 JAVA中String[]数组删除指定的元素

json数据 : strResult{ "Code": 0, "Data": [{ "Id": 25, "Name": "支付宝", "Logo": "/content/images/yhk24.jpg" }, { "Id": 1, &quot

2018-08-24 10:55:15 20716

原创 JAVA中用代码自己创建一个JsonObject对象

JsonObject object=new JsonObject();JsonArray array=new JsonArray();JsonObject lan1=new JsonObject();lan1.addProperty("type", 1);lan1.addProperty("timing", "40:20");lan1.addProperty("time", "2016...

2018-07-28 09:07:28 20325 3

原创自定义RecyclerView的GridLayoutManger的实现效果

adapter = new CommodityRecommendationAdapter(this, datas);rv_commodity_recommendation.setLayoutManager(new GridLayoutManager(this,2));rv_commodity_recommendation.setAdapter(adapter);adapter.notify...

2018-07-25 15:51:21 1612

原创得到两个图片的路径通过MD5值比较两个图片是否相同

//图片1的路径private String tuPian1 = null;//图片2的路径private String tuPian2 = null;//图片1的MD5值private String tuPian1Md5;//图片2的MD5值private String tuPian1Md5;//通过图片本地路径拿到MD5public static Strin...

2018-07-20 09:29:33 2048

原创 Failed to apply plugin [id 'com.android.application']

* What went wrong:A problem occurred evaluating project ':app'.> Failed to apply plugin [id 'com.android.application'] > Gradle version 2.10 is required. Current version is 4.4. If using t...

2018-07-16 18:31:27 4720

原创 android中让popupwindow显示在activity的中央

private void showPopwindowMenu(Activity activity) { View popView = View.inflate(this, R.layout.reset_pwd_sure, null); TextView btn = (TextView) popView .findViewById(R.i...

2018-07-09 15:39:26 1302

原创 Button根据多个EditText输入条件改变背景颜色

et_usename = (EditText) findViewById(R.id.et_phone);et_code = (EditText) findViewById(R.id.et_code);bt_register = (Button) findViewById(R.id.bt_register);bt_register.setOnClickListener(this);Watch...

2018-07-05 17:28:39 557

原创 Android中为ListView的Item设置不同颜色背景

@Overridepublic View getView(final int position, View convertView, ViewGroup parent) { final ViewHolder holder; if (convertView == null) { holder = new ViewHolder(); convertVi...

2018-07-02 16:55:09 3678

原创 Android中Sockect长连接粘包的处理方式

//初始化Socketprivate void initSocket() { try { Socket so = new Socket(HOST, PORT); mSocket = new WeakReference<Socket>(so); mReadThread = new ReadThread(so...

2018-06-26 09:58:37 1142

原创安卓中点击文本按钮弹出窗口进行修改的TextView显示出来

@Override public void onClick(View v) { switch (v.getId()) { case R.id.iv_usename_pic: amend(); break; }} public void amend() { ...

2018-06-26 09:18:37 4755

原创点击按钮选择手机上的图片显示在ImageView上

@Override public void onClick(View v) { switch (v.getId()) { case R.id.iv_usename_pic: selectPic(); break; } } //打开本地相册选择图...

2018-06-25 17:36:27 770

原创自定义ImagView实现圆形图片

public class RoundPicture extends ImageView{ public RoundPicture(Context context) { super(context); // TODO Auto-generated constructor stub } public RoundPicture(Cont...

2018-06-25 16:56:32 287

原创安卓开发中怎么查找指定手机APP的包名

先打开你所在的sdk的tools文件里面的uiautomatorviewer.bat然后就出现了UI Automator Viewer这个工具再就是点击下面的第二个图标就可以选择你所需要的手机上APP,最后在最右下角可以看到package所需要的包名,就是这么简单就可以得到应用商店所有APP的包名,不需要你去反编译才能得到所不知道的包名!...

2018-06-12 11:03:02 1109

双击点赞动画

android 5.1设备中运行程序编译不通过，在8.1上又能运行，求大神解惑？