效果图:
布局文件如下:
<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.takephoto.MainActivity"
android:orientation="vertical">
<ImageView
android:id="@+id/img"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="拍照"
android:textSize="18sp"
android:layout_gravity="center_horizontal"/>
</LinearLayout>
主代码:
public class MainActivity extends Activity {
ImageView img;
Button btn;
Uri uri;
final int TAKE_PHOTO = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
img = (ImageView)findViewById(R.id.img);
btn = (Button)findViewById(R.id.btn);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
//图片名为image
File output = new File(Environment.getExternalStorageDirectory(), "image.jpg");
try {
if(output.exists())
output.delete();
output.createNewFile();
}catch(IOException e) {
}
uri = Uri.fromFile(output);
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
startActivityForResult(intent, TAKE_PHOTO);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if(requestCode == TAKE_PHOTO && resultCode == RESULT_OK) {
try {
Bitmap bm = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));
img.setImageBitmap(bm);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
别忘了在manifest文件里进行权限配置:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
加在uses-sdk结束后。
就酱。