Android calls the phone's camera method
- 2020-08-22 22:42:14
- OfStack
This article gives an example of how Android calls the phone's camera function. Share to everybody for everybody reference. The details are as follows:
1. main. xml layout file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView android:id="@+id/imageView"
android:adjustViewBounds="true"
android:layout_gravity="center"
android:minWidth="150dip"
android:minHeight="150dip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<Button android:id="@+id/btnPhone"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text=" Photo album " />
<Button android:id="@+id/btnTakePicture"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:text=" Taking pictures " />
</LinearLayout>
2. Core code:
package com.ljq.test;
import java.io.ByteArrayOutputStream;
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class TestActivity extends Activity {
private static final int NONE = 0;
private static final int PHOTO_GRAPH = 1;// Taking pictures
private static final int PHOTO_ZOOM = 2; // The zoom
private static final int PHOTO_RESOULT = 3;// The results of
private static final String IMAGE_UNSPECIFIED = "image/*";
private ImageView imageView = null;
private Button btnPhone = null;
private Button btnTakePicture = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
imageView = (ImageView) findViewById(R.id.imageView);
btnPhone = (Button) findViewById(R.id.btnPhone);
btnPhone.setOnClickListener(onClickListener);
btnTakePicture = (Button) findViewById(R.id.btnTakePicture);
btnTakePicture.setOnClickListener(onClickListener);
}
private final View.OnClickListener onClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
if(v==btnPhone){ // Get an image from an album
Intent intent = new Intent(Intent.ACTION_PICK, null);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
startActivityForResult(intent, PHOTO_ZOOM);
}else if(v==btnTakePicture){ // Get an image from a photo
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment
.getExternalStorageDirectory(),"temp.jpg")));
startActivityForResult(intent, PHOTO_GRAPH);
}
}
};
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == NONE)
return;
// Taking pictures
if (requestCode == PHOTO_GRAPH) {
// Set the file save path
File picture = new File(Environment.getExternalStorageDirectory()
+ "/temp.jpg");
startPhotoZoom(Uri.fromFile(picture));
}
if (data == null)
return;
// Read albums to zoom in and out pictures
if (requestCode == PHOTO_ZOOM) {
startPhotoZoom(data.getData());
}
// The processing results
if (requestCode == PHOTO_RESOULT) {
Bundle extras = data.getExtras();
if (extras != null) {
Bitmap photo = extras.getParcelable("data");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);// (0-100) The compressed file
// Here we can put Bitmap Save to sd In the card
imageView.setImageBitmap(photo); // Show the picture in ImageView Controls on
}
}
super.onActivityResult(requestCode, resultCode, data);
}
/**
* images
*
* @param uri
*/
public void startPhotoZoom(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
intent.putExtra("crop", "true");
// aspectX aspectY It's the ratio of width to height
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// outputX outputY Is cropped image width and height
intent.putExtra("outputX", 300);
intent.putExtra("outputY", 500);
intent.putExtra("return-data", true);
startActivityForResult(intent, PHOTO_RESOULT);
}
}
Hopefully, this article has helped you with your Android programming.