本文主要介绍Android中从Gallery获取图片
设计项目布局
<LinearLayout 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"
android:orientation="vertical"
tools:context=".MainActivity" > <Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="selectImage"
android:text="选择一张照片" /> <ImageView
android:id="@+id/iv"
android:layout_width="fill_parent"
android:layout_height="fill_parent" /> </LinearLayout>
打开packages\apps\Gallery下的清单文件，可以看到其中包含下面的代码：
<activity android:name="com.android.camera.ImageGallery"
android:label="@string/gallery_label"
android:configChanges="orientation|keyboardHidden"
android:icon="@drawable/ic_launcher_gallery">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.dir/image" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.dir/video" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.GET_CONTENT" />
<category android:name="android.intent.category.OPENABLE" />
<data android:mimeType="vnd.android.cursor.dir/image" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.GET_CONTENT" />
<category android:name="android.intent.category.OPENABLE" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
<data android:mimeType="video/*" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.PICK" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
<data android:mimeType="video/*" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.PICK" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.dir/image" />
</intent-filter>
</activity>
逻辑部分代码如下：
public class MainActivity extends Activity {
private ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
iv = (ImageView) findViewById(R.id.iv);
}
public void selectImage(View view) {
// 激活系统图库的应用 选择一张照片
Intent intent = new Intent();
intent.setAction(intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, 0);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (data != null) {
Uri uri = data.getData(); // 图片的uri路径
iv.setImageURI(uri);
}
super.onActivityResult(requestCode, resultCode, data);
}
}