android调用系统资源裁剪图片

1 import java.io.File;
2 import android.app.Activity;
3 import android.content.Intent;
4 import android.graphics.drawable.Drawable;
5 import android.net.Uri;
6 import android.os.Bundle;
7 import android.view.View;
8 import android.view.View.OnClickListener;
9 import android.widget.Button;
10
11 public class GalleryActivity extends Activity {
12
13 private static int SELECT_PICTURE;//返回标志位 filed
14
15 private File tempFile;
16
17 Button button;
18
19 /** Called when the activity is first created. */
20 @Override
21 public void onCreate(Bundle savedInstanceState) {
22 super.onCreate(savedInstanceState);
23 this.tempFile = new File("/sdcard/a.jpg");// 这句一定要在onCreate()里面调用
24 button = new Button(this);
25 button.setText("获取图片");
26 button.setOnClickListener(new OnClickListener() {
27 @Override
28 public void onClick(View v) {
29 Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
30 intent.setType("image/*");
31 intent.putExtra("crop", "true");// crop=true 有这句才能出来最后的裁剪页面.
32
33 intent.putExtra("aspectX", 1);// 这两项为裁剪框的比例.
34 intent.putExtra("aspectY", 2);// x:y=1:2
35
36 intent.putExtra("output", Uri.fromFile(tempFile));
37 intent.putExtra("outputFormat", "JPEG");//返回格式
38
39 startActivityForResult(Intent.createChooser(intent, "选择图片"), SELECT_PICTURE);
40 }
41 });
42 setContentView(button);
43 }
44
45 /**
46 * 裁剪完图片后系统调用的方法:onActivityResult
47 */
48 @Override
49 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
50 if (resultCode == RESULT_OK)
51 if (requestCode == SELECT_PICTURE)
52 button.setBackgroundDrawable(Drawable.createFromPath(tempFile.getAbsolutePath()));
53 }
54 }

protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){
if(resultCode==RESULT_OK){
switch(requestCode){
caseREQ_CODE_CAMERA:
uploadImage(photoTemp);
break;
caseREQ_CODE_PICTURES:
Uriuri=data.getData();
ContentResolvercr=this.getContentResolver();
//getthephysicalpathoftheimage
Cursorc=cr.query(uri,null,null,null,null);
c.moveToFirst();
photoTemp=c.getString(c.getColumnIndex("_data"));
uploadImage(photoTemp);
break;
default:
break;
};
}
super.onActivityResult(requestCode,resultCode,data);
}

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