【实例简介】实现打开图片功能

【实例截图】

【核心代码】

此为打开图片功能实现：

public class MainActivity extends Activity {

//自定义变量

private Button selectPhoto;              //选择图片

private final int IMAGE_OPEN = 1;  //打开图片标记

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//选择图片并传递图片路径信息给处理图片活动

selectPhoto = (Button) findViewById(R.id.button1);

selectPhoto.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

Intent intent = new Intent(Intent.ACTION_PICK,

android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

startActivityForResult(intent, IMAGE_OPEN);

}

});

}

//获取图片路径 响应startActivityForResult

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

//打开图片

if(resultCode==RESULT_OK && requestCode==IMAGE_OPEN) {

Uri uri = data.getData();

if (!TextUtils.isEmpty(uri.getAuthority())) {

//查询选择图片

Cursor cursor = getContentResolver().query(

uri,

new String[] { MediaStore.Images.Media.DATA },

null,

null,

null);

//返回 没找到选择图片

if (null == cursor) {

return;

}

//光标移动至开头 获取图片路径

cursor.moveToFirst();

String path = cursor.getString(cursor

.getColumnIndex(MediaStore.Images.Media.DATA));

//Toast.makeText(this, path, Toast.LENGTH_SHORT).show();

//向处理活动传递数据

Intent intent = new Intent(this, ProcessActivity.class); //主活动->处理活动

intent.putExtra("path", path);

startActivity(intent);

} else {

Intent intent = new Intent(this, ProcessActivity.class); //主活动->处理活动

intent.putExtra("path", uri.getPath());

startActivity(intent);

}

}  //end if 打开图片

}

}