不使用布局文件，代码中自定义界面

最新推荐文章于 2022-06-08 00:39:56 发布

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最新推荐文章于 2022-06-08 00:39:56 发布

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分类专栏： android 文章标签： android Android ANDROID layout Layout

本文链接：https://blog.youkuaiyun.com/miaojunking/article/details/8440149

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本文详细介绍了如何使用WindowManager直接添加自定义界面至Android应用窗口，包括设置类型、格式、布局参数等关键步骤，并通过实例展示了如何实现界面间的交互。

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package com.mj.testwindow;

import android.app.Activity;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

private WindowManager mWindowManager = null;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

// setContentView();

mWindowManager = (WindowManager) getApplicationContext()
.getSystemService("window");

addWin();
}

private WindowManager.LayoutParams mLayoutParams = new WindowManager.LayoutParams();

private View mView = null;

// 使用WindowManager.addView()直接添加view到WindowManager
void addWin() {

mView = InitView();

mLayoutParams.type = LayoutParams.TYPE_PHONE; // 设置window
// type
mLayoutParams.format = PixelFormat.RGBA_8888; // 设置图片格式，效果为背景透明

mLayoutParams.flags = LayoutParams.FLAG_ALT_FOCUSABLE_IM
| LayoutParams.FLAG_NOT_FOCUSABLE;

mLayoutParams.gravity = Gravity.TOP | Gravity.LEFT;

mLayoutParams.x = 0;
mLayoutParams.y = 0;

// mLayoutParams.height = 100;
// mLayoutParams.width = 150;

mLayoutParams.height = LayoutParams.WRAP_CONTENT;
mLayoutParams.width = LayoutParams.WRAP_CONTENT;

mWindowManager.addView(mView, mLayoutParams);
}

int left_arrow_id = 0x123654;
int right_arrow_id = left_arrow_id + 100;

TextView mTv_right = null;
TextView mTv_left = null;

int ARROW_WIDTH = 40;

// 不使用布局文件，自定义界面
private View InitView() {
// FrameLayout group = new FrameLayout(this);
FrameLayout flyt = new FrameLayout(this);
RelativeLayout layout = new RelativeLayout(this);
mTv_left = new TextView(this);
mTv_left.setText("<");
mTv_left.setId(left_arrow_id);
mTv_left.setGravity(Gravity.CENTER);
mTv_left.setOnClickListener(mListener);

mTv_right = new TextView(this);
mTv_right.setText(">");
mTv_right.setId(right_arrow_id);
mTv_right.setGravity(Gravity.CENTER);
mTv_right.setVisibility(View.GONE);
mTv_right.setOnClickListener(mListener);

RelativeLayout.LayoutParams p1 = new RelativeLayout.LayoutParams(ARROW_WIDTH,
FrameLayout.LayoutParams.MATCH_PARENT);
p1.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
layout.addView(mTv_left, p1);

RelativeLayout.LayoutParams p2 = new RelativeLayout.LayoutParams(ARROW_WIDTH,
FrameLayout.LayoutParams.MATCH_PARENT);
p2.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
layout.addView(mTv_right, p2);

ImageView img = new ImageView(this);
img.setBackgroundResource(R.drawable.background);
RelativeLayout.LayoutParams p3 = new RelativeLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
p3.addRule(RelativeLayout.LEFT_OF, right_arrow_id);
p3.addRule(RelativeLayout.RIGHT_OF, left_arrow_id);
layout.addView(img, p3);

img.setOnLongClickListener(new View.OnLongClickListener() {

@Override
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
mWindowManager.removeView(mView);

return false;
}
});

FrameLayout.LayoutParams p4 = new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT, FrameLayout.LayoutParams.MATCH_PARENT);
flyt.addView(layout, p4);

return flyt;
}

private View.OnClickListener mListener = new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (v.getId() == left_arrow_id) {
mTv_right.setVisibility(View.VISIBLE);
mTv_left.setVisibility(View.GONE);
} else if (v.getId() == right_arrow_id) {
mTv_right.setVisibility(View.GONE);
mTv_left.setVisibility(View.VISIBLE);
}
}
};

}