android 仿QQ动态背景、视频背景的示例代码

 public class CustomVideoView extends VideoView {  public CustomVideoView(Context context) {    super(context);  }  public CustomVideoView(Context context, AttributeSet attrs) {    super(context, attrs);  }  public CustomVideoView(Context context, AttributeSet attrs, int defStyle) {    super(context, attrs, defStyle);  }  @Override  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {    //我们重新计算高度    int width = getDefaultSize(0, widthMeasureSpec);    int height = getDefaultSize(0, heightMeasureSpec);    setMeasuredDimension(width, height);  }  @Override  public void setOnPreparedListener(MediaPlayer.OnPreparedListener l) {    super.setOnPreparedListener(l);  }  @Override  public boolean onKeyDown(int keyCode, KeyEvent event) {    return super.onKeyDown(keyCode, event);  }}

public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private CustomVideoView videoview;    private Button  btn_enter;    @Override    protected void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      // requestWindowFeature(Window.FEATURE_NO_TITLE);      setContentView(R.layout.activity_main);      initView();    }    /**     * 初始化     */    private void initView() {      btn_enter = (Button) findViewById(R.id.btn_enter);      btn_enter.setOnClickListener(this);      videoview = (CustomVideoView) findViewById(R.id.videoview);      videoview.setVideoURI(Uri.parse("android.resource://"+getPackageName()+"/"+R.raw.shipin2));      //播放      videoview.start();      //循环播放      videoview.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {        @Override        public void onCompletion(MediaPlayer mediaPlayer) {          videoview.start();          mediaPlayer.setOnInfoListener(new MediaPlayer.OnInfoListener() {            @Override            public boolean onInfo(MediaPlayer mp, int what, int extra) {              return false;            }          });        }      });    }    @Override    public void onClick(View view) {      switch (view.getId()){        case R.id.btn_enter:          Toast.makeText(this,"登录成功了",Toast.LENGTH_SHORT).show();          break;      }    }    //返回重启加载    @Override    protected void onRestart() {      super.onRestart();      initView();    }    //防止锁屏或者切出的时候，音乐在播放    @Override    protected void onStop() {      super.onStop();      videoview.stopPlayback();    }  }

  <?xml version="1.0" encoding="utf-8"?>  <FrameLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    >     <!--CustomVideoView 自定义视频类的位置-->    <application1.applicationlong.CustomVideoView      android:id="@+id/videoview"      android:layout_width="match_parent"      android:layout_height="match_parent" />    <LinearLayout      android:layout_width="match_parent"      android:layout_height="match_parent"      android:gravity="top"      android:orientation="vertical">      <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginLeft="38dp"        android:layout_marginRight="38dp"        android:layout_marginTop="70dp"        android:orientation="vertical">        <EditText          android:id="@+id/et_phone"          android:layout_width="match_parent"          android:layout_height="40dp"          android:layout_gravity="center_vertical"          android:background="@null"          android:digits="0123456789"          android:gravity="center_vertical"          android:hint="请输入手机号"          android:inputType="number"          android:maxLength="11"          android:maxLines="1"          android:paddingLeft="5dp"          android:textColor="@android:color/white"          android:textColorHint="@android:color/white"          android:textSize="18sp"/>        <View          android:layout_width="match_parent"          android:layout_height="1dp"          android:layout_alignParentBottom="true"          android:background="@color/black"/>        <EditText          android:id="@+id/et_pwd"          android:layout_width="match_parent"          android:layout_height="40dp"          android:layout_marginTop="20dp"          android:background="@null"          android:gravity="center_vertical"          android:hint="请输入密码"          android:inputType="textPassword"          android:maxLength="11"          android:maxLines="1"          android:paddingLeft="5dp"          android:textColor="@android:color/white"          android:textColorHint="@android:color/white"          android:textSize="18sp"/>        <View          android:layout_width="match_parent"          android:layout_height="1dp"          android:layout_alignParentBottom="true"          android:background="@color/black"/>      </LinearLayout>      <RelativeLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginLeft="23dp"        android:layout_marginRight="23dp"        android:orientation="horizontal">        <TextView          android:id="@+id/tv_register"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:padding="15dp"          android:text="快速注册"          android:textColor="@color/green"/>        <TextView          android:id="@+id/tv_find_pwd"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_alignParentEnd="true"          android:layout_alignParentRight="true"          android:layout_alignParentTop="true"          android:gravity="right"          android:padding="15dp"          android:text="忘记密码?"          android:textColor="@color/green"/>      </RelativeLayout>      <Button        android:id="@+id/btn_enter"        style="?android:attr/borderlessButtonStyle"        android:layout_width="match_parent"        android:layout_height="45dp"        android:layout_gravity="center_horizontal"        android:layout_marginLeft="30dp"        android:layout_marginRight="30dp"        android:layout_marginTop="20dp"        android:background="@color/darkseagreen"        android:text="登录"        android:textColor="@color/white"        android:textSize="18dp"/>    </LinearLayout>    <LinearLayout      android:layout_width="match_parent"      android:layout_height="wrap_content"      android:layout_gravity="bottom"      android:paddingBottom="30dp"      android:orientation="vertical">      <TextView        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginTop="90dp"        android:gravity="center"        android:text="使用第三方登录"        android:textColor="@color/white"        android:textSize="16dp"        android:visibility="visible"/>      <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center_horizontal"        android:orientation="horizontal">        <ImageView          android:id="@+id/iv_wechat"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_marginTop="10dp"          android:padding="10dp"          android:src="@drawable/qq"/>        <ImageView          android:id="@+id/iv_qq"          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_marginLeft="20dp"          android:layout_marginTop="10dp"          android:padding="10dp"          android:src="@drawable/weixin"/>      </LinearLayout>    </LinearLayout>  </FrameLayout>