前言
此次安卓是对于android拍照片后返回到前端的imageView的程序
问题
Android 7.0对于文件的权限报错问题还是一个大问题,尚且有点问题,本程序兼容安卓前面的版本
布局问价(xml文件)
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| <?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="相册" /> <Button android:id="@+id/btnTakePicture" android:layout_height="wrap_content" android:layout_width="fill_parent" android:text="拍照" /> </LinearLayout>
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Java文件
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| package com.aclihui.takeaphoto;
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 MainActivity extends Activity {
private static final int NONE = 0; private static final int PHOTO_GRAPH = 1; private static final int PHOTO_ZOOM = 2; private static final int PHOTO_RESOULT = 3; 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.activity_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){ 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){
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; if (requestCode == PHOTO_GRAPH) { File picture = new File(Environment.getExternalStorageDirectory() + "/temp.jpg"); startPhotoZoom(Uri.fromFile(picture)); }
if (data == null) return;
if (requestCode == PHOTO_ZOOM) { startPhotoZoom(data.getData()); } 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); imageView.setImageBitmap(photo); }
}
super.onActivityResult(requestCode, resultCode, data); }
public void startPhotoZoom(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, IMAGE_UNSPECIFIED); intent.putExtra("crop", "true"); intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1); intent.putExtra("outputX", 300); intent.putExtra("outputY", 500); intent.putExtra("return-data", true); startActivityForResult(intent, PHOTO_RESOULT); }
}
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兼容性问题
兼容性问题是一个很大的问题。对于7.0以下的文件比较好解决。