Android中Activity切換時共享視圖元素的切換動畫（4.x兼容方案）

方案一：PreLollipopTransition

首先在 build.gradle 配置文件添加這個庫依賴

dependencies {
    compile 'com.kogitune:pre-lollipop-activity-transition:1.0.0'
}

首先是啟動的 Activity 中

findViewById(R.id.imageView).setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        final Intent intent = new Intent(MainActivity.this, SubActivity.class);
        ActivityTransitionLauncher.with(MainActivity.this).from(v).launch(intent);
    }
});

在接收這個 Intent 的 Activity 中寫如下代碼：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sub);
    ActivityTransition.with(getIntent()).to(findViewById(R.id.sub_imageView)).start(savedInstanceState);
}

退出動畫的實現

private ExitActivityTransition exitTransition;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sub2);
    exitTransition = ActivityTransition.with(getIntent()).to(findViewById(R.id.sub_imageView)).start(savedInstanceState);
}
@Override
public void onBackPressed() {
    exitTransition.exit(this);
}