android调用系统相机拍照并裁剪

最新推荐文章于 2019-06-10 10:46:01 发布

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最新推荐文章于 2019-06-10 10:46:01 发布

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分类专栏： android基础

本文链接：https://blog.youkuaiyun.com/lib739449500/article/details/46740847

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本文介绍如何在Android应用中使用相机API进行图片拍摄，并通过裁剪操作优化图片质量。详细阐述了从启动相机到获取裁剪后的图片的完整流程，包括设置相机参数、触发拍摄、解析返回数据以及裁剪图片等关键步骤。

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public class WelcomActivity extends Activity {
/** Called when the activity is first created. */
private Button btnTake = null;
private ImageView lblImage = null;

private static final int PHOTO_PICKED_WITH_DATA = 3021;
private static final int CAMERA_WITH_DATA = 3023;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

btnTake = (Button) findViewById(R.id.btnTake);
lblImage = (ImageView) findViewById(R.id.lblImage);
btnTake.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_WITH_DATA);
}
});

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if (resultCode != RESULT_OK)
return;
switch (requestCode) {
case CAMERA_WITH_DATA:
final Bitmap photo = data.getParcelableExtra("data");
if (photo != null) {
doCropPhoto(photo);
}
case PHOTO_PICKED_WITH_DATA:
Bitmap photo1 = data.getParcelableExtra("data");
if (photo1 != null) {
lblImage.setImageBitmap(photo1);
}

}
}

protected void doCropPhoto(Bitmap data) {
Intent intent = getCropImageIntent(data);
startActivityForResult(intent, PHOTO_PICKED_WITH_DATA);
}

public static Intent getCropImageIntent(Bitmap data) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setType("image/*");
intent.putExtra("data", data);
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 128);
intent.putExtra("outputY", 128);
intent.putExtra("return-data", true);
return intent;
}
}