1ScallView
2src
不会被拉伸
3BackGround
会被拉伸
4scaleType
5蒙版android:tint=”#55ff0000”
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@mipmap/baby"
android:scaleType="center"
/>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@mipmap/baby"
android:scaleType="fitStart"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@mipmap/baby"
android:scaleType="fitEnd"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@mipmap/baby"
android:scaleType="fitCenter"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@mipmap/baby"
android:scaleType="fitXY"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@mipmap/baby"
android:scaleType="centerCrop"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:src="@mipmap/baby"
android:scaleType="centerInside"/>
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@mipmap/baby"
/>
</LinearLayout>
</ScrollView>
添加透明度变化按钮
public class ImageViewActivity extends AppCompatActivity implements View.OnClickListener {
private ImageView mImageView;
private Button buttonadd;
private Button buttonsub;
private int alpha;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.imageview);
mImageView=(ImageView)findViewById(R.id.imageview1);
buttonadd=(Button)findViewById(R.id.set_alpha_add);
buttonsub=(Button)findViewById(R.id.set_alpha_sub);
mImageView.setImageResource(R.mipmap.tangyan);
}
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
@Override
public void onClick(View v) {
int code =android.os.Build.VERSION.SDK_INT;
switch (v.getId()) {
case R.id.set_alpha_add:
alpha+=5;
if(code<16){
mImageView.setAlpha(alpha);
}else{
mImageView.setImageAlpha(alpha);
}
break;
case R.id.set_alpha_sub:
alpha-=5;
if(code<16){
mImageView.setAlpha(alpha);
}else{
mImageView.setImageAlpha(alpha);
}
break;
default:
break;
}
}
}