如何在ImageView中单击以全屏显示图像？

Question

单击ImageView后，我需要全屏打开图像，就像带有一个图像的图库一样！我该怎么做？

Answer 1

这是一个基本示例：

布局 activity_main.xml

   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center">

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:adjustViewBounds="true"
            android:src="@drawable/ic_launcher"/>

    </LinearLayout>

onCreate() 方法：

private boolean zoomOut =  false;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    final ImageView imageView  = (ImageView)findViewById(R.id.imageView1);
    imageView .setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            if(zoomOut) {
                Toast.makeText(getApplicationContext(), "NORMAL SIZE!", Toast.LENGTH_LONG).show();
                imageView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
                imageView.setAdjustViewBounds(true);
                zoomOut =false;
            }else{
                Toast.makeText(getApplicationContext(), "FULLSCREEN!", Toast.LENGTH_LONG).show();
                imageView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
                imageView.setScaleType(ImageView.ScaleType.FIT_XY);
                zoomOut = true;
            }
        }                   
    });
}