Android-获取view的宽高

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方式：

方式1：监听，如setOnClickListener

方式2：监听，如addOnGlobalLayoutListener

方式3：view.post 或 view.postdelay

方式4：onWindowFocusChanged

方式5：

示例：

布局：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <Button        android:id="@+id/btn"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="获取view的宽高" /></LinearLayout>

代码：

public class MyActivity extends FragmentActivity {    private Button btn;    private int mHeight;    private int mMeasuredHeight;    @Override    protected void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.test3);        btn = ((Button) this.findViewById(R.id.btn));        mHeight = btn.getHeight();        mMeasuredHeight = btn.getMeasuredHeight();        Log.e("111", "onCreate==" + mHeight + " | " + mMeasuredHeight);//onCreate==0 | 0        //方式1：监听，如setOnClickListener        btn.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                mHeight = btn.getHeight();                mMeasuredHeight = btn.getMeasuredHeight();                Log.e("111", "onClick==" + mHeight + " | " + mMeasuredHeight);//onClick==144 | 144            }        });        //方式2：监听，如addOnGlobalLayoutListener        btn.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {            @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)            @Override            public void onGlobalLayout() {                btn.getViewTreeObserver().removeOnGlobalLayoutListener(this);                mHeight = btn.getHeight();                mMeasuredHeight = btn.getMeasuredHeight();                Log.e("111", "onGlobalLayout==" + mHeight + " | " + mMeasuredHeight);//onGlobalLayout==144 | 144            }        });        //方式3：view.post        btn.post(new Runnable() {            @Override            public void run() {                mHeight = btn.getHeight();                mMeasuredHeight = btn.getMeasuredHeight();                Log.e("111", "post==" + mHeight + " | " + mMeasuredHeight);//post==144 | 144            }        });    }    @Override    protected void onResume() {        super.onResume();        mHeight = btn.getHeight();        mMeasuredHeight = btn.getMeasuredHeight();        Log.e("111", "onResume==" + mHeight + " | " + mMeasuredHeight);//onResume==0 | 0    }    @Override    protected void onStart() {        super.onStart();        mHeight = btn.getHeight();        mMeasuredHeight = btn.getMeasuredHeight();        Log.e("111", "onStart==" + mHeight + " | " + mMeasuredHeight);//onStart==0 | 0    }    @Override    public void onWindowFocusChanged(boolean hasFocus) {        super.onWindowFocusChanged(hasFocus);        mHeight = btn.getHeight();        mMeasuredHeight = btn.getMeasuredHeight();        Log.e("111", "onWindowFocusChanged==" + mHeight + " | " + mMeasuredHeight);//onWindowFocusChanged==144 | 144    }}

打印log顺序：

onCreate==0 | 0onStart==0 | 0onResume==0 | 0onGlobalLayout==144 | 144post==144 | 144onWindowFocusChanged==144 | 144

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