Android实现打开系统照相机&相册图片展示

Android实现打开系统照相机&相册图片展示

Android系统本身提供了非常多的多媒体应用的API可供开发人员使用开发功能多彩多样的app，那么，因为之前自己完成的一个小小的app里面刚好我就用到了“打开系统照相机和打开相册”这两个部分的功能然后完成一个“图片空间”的这样一个子模块的功能。然后我接下来就会把我的代码给出来，然后大致上介绍一下怎样实现具体的功能。

1.主要功能java代码

 （1）打开系统照相机

private Button btn_takephoto；

btn_takephoto = (Button) findViewById(R.id.btn_takephoto);

btn_takephoto.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setAction("android.media.action.IMAGE_CAPTURE");
intent.addCategory("android.intent.category.DEFAULT");
startActivity(intent);
}

}); （2）打开相册及展示
private Button  btn_choosephoto；
private ImageView img;

btn_choosephoto.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {
    // TODO Auto-generated method stub
     Intent i = new Intent(Intent.ACTION_PICK,
               android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
      startActivityForResult(i, RESULT_LOAD_IMAGE);
     }
 });

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
    Uri selectedImage = data.getData();
    String[] filePathColumn = { MediaStore.Images.Media.DATA };
    Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
    cursor.moveToFirst();
    int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
    String picturePath = cursor.getString(columnIndex);
    cursor.close();
    img.setImageBitmap(BitmapFactory.decodeFile(picturePath));
   }

}

2.完整java代码

import com.example.mynote.R;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v4.content.ContextCompat;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class PhotoActivity extends Activity {
protected static final int RESULT_LOAD_IMAGE = 0;
private Button btn_takephoto, btn_choosephoto, photo_back;
private ImageView img;

@SuppressLint("ServiceCast")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_shake);
btn_takephoto = (Button) findViewById(R.id.btn_takephoto);
btn_choosephoto = (Button) findViewById(R.id.btn_choosephoto);
photo_back = (Button) findViewById(R.id.photo_back);
img = (ImageView) findViewById(R.id.img);

// 返回键设置点击事件
photo_back.setOnTouchListener((new View.OnTouchListener() {

@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View view, MotionEvent ev) {
// TODO Auto-generated method stub
int action = ev.getAction();
switch (action) {
case MotionEvent.ACTION_DOWN:
photo_back.setBackground(ContextCompat.getDrawable(getApplicationContext(), R.drawable.back_click));
break;
case MotionEvent.ACTION_UP:
photo_back.setBackground(ContextCompat.getDrawable(getApplicationContext(), R.drawable.back));
Intent intent = new Intent(getApplicationContext(), ChooseActivity.class);
startActivity(intent);
}
return false;
}
}));
btn_takephoto.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setAction("android.media.action.IMAGE_CAPTURE");
intent.addCategory("android.intent.category.DEFAULT");
startActivity(intent);
}

});

btn_choosephoto.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(Intent.AC
9c6f
TION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
img.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}

}
}


3.布局文件

<RelativeLayout 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"
tools:context="${relativePackage}.${activityClass}" >

<RelativeLayout
android:id="@+id/rl"
android:layout_width="match_parent"
android:layout_height="55dp"
android:background="#ff0000" >

<Button
android:id="@+id/photo_back"
android:layout_width="45dp"
android:layout_height="45dp"
android:layout_marginTop="5dp"
android:background="@drawable/back" >
</Button>

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="我的图片空间"
android:textColor="#ffffff"
android:textSize="25sp" />
</RelativeLayout>

<View
android:id="@+id/top1"
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#ff0000"
android:layout_below="@+id/rl"
android:layout_marginTop="25dp"></View>

<View
android:id="@+id/top2"
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#ff0000"
android:layout_below="@+id/img"
android:layout_marginTop="20dp"></View>
<View
android:id="@+id/left"
android:layout_width="2dp"
android:layout_height="match_parent"
android:background="#ff0000"
android:layout_toLeftOf="@+id/btn_takephoto"
android:layout_marginLeft="5dp"
android:layout_marginTop="25dp"></View>

<View
android:id="@+id/right"
android:layout_width="2dp"
android:layout_height="match_parent"
android:background="#ff0000"
android:layout_toRightOf="@+id/btn_takephoto"
android:layout_marginTop="20dp"></View>
<View
android:id="@+id/bottom1"
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#ff0000"
android:layout_below="@+id/img"
android:layout_marginTop="25dp"></View>

<View
android:id="@+id/bottom2"
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#ff0000"
android:layout_below="@+id/rl"
android:layout_marginTop="20dp"></View>

<Button
android:id="@+id/btn_takephoto"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_below="@+id/rl"
android:layout_marginTop="50dp"
android:background="#ff0000"
android:text="打开照相机"
android:layout_centerHorizontal="true"
android:textColor="#ffffff"
android:textSize="20sp" >
</Button>

<Button
android:id="@+id/btn_choosephoto"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_below="@+id/btn_takephoto"
android:layout_marginTop="15dp"
android:layout_centerHorizontal="true"
android:background="#ff0000"
android:text="从相册中选择照片"
android:textColor="#ffffff"
android:textSize="20sp" >
</Button>

<ImageView
android:id="@+id/img"
android:layout_width="match_parent"
android:layout_height="340dp"
android:layout_below="@+id/btn_choosephoto"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="15dp"
android:background="@drawable/img" >
</ImageView>

</RelativeLayout>