Android基礎教程之裁截圖片

Android基礎教程之裁截圖片：

1. package xiaosi.cut;
2. import java.io.File;
3. import android.app.Activity;
4. import android.content.Intent;
5. import android.graphics.drawable.Drawable;
6. import android.net.Uri;
7. import android.os.Bundle;
8. import android.view.View;
9. import android.view.View.OnClickListener;
10. import android.view.ViewGroup.LayoutParams;
11. import android.widget.Button;
13. public class CutActivity extends Activity {
15. private static int SELECT_PICTURE;//返回標志位 filed
16. private File tempFile;
17. private Button button;
18. /** Called when the activity is first created. */
19. @Override
20. public void onCreate(Bundle savedInstanceState) {
21. super.onCreate(savedInstanceState);
22. //setContentView(R.layout.main);
23. this.tempFile = new File("/sdcard/song/a.jpg");
24. button = new Button(this);
25. button.setText("獲取圖片");
26. button.setOnClickListener(new OnClickListener() {
27. public void onClick(View v) {
28. Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
29. intent.setType("image/*");
30. intent.putExtra("crop", "true");// crop=true 有這句才能出來最後的裁剪頁面.
32. intent.putExtra("aspectX", 1);// 這兩項為裁剪框的比例.
33. intent.putExtra("aspectY", 2);// x:y=1:2
35. intent.putExtra("output", Uri.fromFile(tempFile));
36. intent.putExtra("outputFormat", "JPEG");//返回格式
38. startActivityForResult(Intent.createChooser(intent, "選擇圖片"), SELECT_PICTURE);
39. }
40. });
41. setContentView(button);
42. }
44. /**
45. * 裁剪完圖片後系統調用的方法:onActivityResult
46. */
47. @Override
48. protected void onActivityResult(int requestCode, int resultCode, Intent data) {
49. if (resultCode == RESULT_OK)
50. if (requestCode == SELECT_PICTURE)
51. button.setBackgroundDrawable(Drawable.createFromPath(tempFile.getAbsolutePath()));
52. }
53. }