java - 如何为网格图像提供共享选项

Question

我正在创建一个应用程序，我想将图像分享到任何社交平台。 我成功地使用了 GridView ，它显示了所有图像，并且可以在特定的完整图像 Activity 中查看以显示用户选择的图像。 我想在获取图像位置并分享到社交平台的应用程序中添加一个社交分享功能。

这是我的 MainActivity.java

package com.jai.desimeme;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;

public class MainActivity extends Activity {

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

    GridView gridView = (GridView) findViewById(R.id.grid_view);

    // Instance of ImageAdapter Class
    gridView.setAdapter(new ImageAdapter(this));

    gridView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View v,
                int position, long id) {

            // Sending image id to FullScreenActivity
            Intent i = new Intent(getApplicationContext(), FullImageActivity.class);
            // passing array index
            i.putExtra("id", position);
            startActivity(i);
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}




}

用我的activity_main.XML

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/grid_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="10dp"
android:gravity="center"
android:horizontalSpacing="5dp"
android:numColumns="4"
android:stretchMode="columnWidth"
android:verticalSpacing="5dp" >

</GridView>

我使用FullImageActivity.java 来预览所选图像//这里我想添加共享链接。

package com.jai.desimeme;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.MenuItem;
import android.widget.ImageView;

@SuppressLint("SdCardPath")
public class FullImageActivity extends Activity {

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

    // get intent data
    Intent i = getIntent();

    // Selected image id
    int position = i.getExtras().getInt("id");
    ImageAdapter imageAdapter = new ImageAdapter(this);

    ImageView imageView = (ImageView) findViewById(R.id.full_image_view);
    imageView.setImageResource(imageAdapter.mThumbIds[position]);
}



    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle item selection
        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
        File sd = Environment.getExternalStorageDirectory();
        String fileName = "test.png";
        File dest = new File(sd, fileName);
        try {
            FileOutputStream out;
            out = new FileOutputStream(dest);
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
            out.flush();
            out.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        switch (item.getItemId()) {
            case R.id.item:
                Uri uri = Uri.fromFile(dest);
                Intent shareIntent = new Intent();
                shareIntent.setAction(Intent.ACTION_SEND);
                shareIntent.putExtra(Intent.EXTRA_STREAM, uri);
                shareIntent.setType("image/jpeg");
                startActivity(Intent.createChooser(shareIntent, getResources().getText(R.string.share)));
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

}

对于上面的代码，我使用了这个 full_image.xml Activity 。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<ImageView
    android:id="@+id/full_image_view"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" />
<ImageView android:id="@+id/full_image_view" 
android:layout_width="100dp" android:layout_height="100dp"
android:src="@drawable/image_border"
style="@style/myImageView" />
</LinearLayout>

在这里我创建了 ImageAdapter.java 来存储图像文件。

package com.jai.desimeme;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter {
private Context mContext;

// Keep all Images in array
public Integer[] mThumbIds = {

        R.drawable.rage_0001,
        ...
        R.drawable.rage_178,



};

// Constructor
public ImageAdapter(Context c){
    mContext = c;
}

@Override
public int getCount() {
    return mThumbIds.length;
}

@Override
public Object getItem(int position) {
    return mThumbIds[position];
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ImageView imageView = new ImageView(mContext);
    imageView.setImageResource(mThumbIds[position]);
    imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
    imageView.setLayoutParams(new GridView.LayoutParams(70, 70));
    return imageView;
}

}

这是我的 AndroidManifest.XML

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jai.desimeme"
android:versionCode="1"
android:versionName="1.1.3" android:installLocation="auto">

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.INTERNET"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" android:permission="android.permission.WRITE_EXTERNAL_STORAGE">
    <activity
        android:name="com.jai.desimeme.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
        <intent-filter>
    <action android:name="android.intent.action.SEND" />
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="image/*" />
</intent-filter>
<intent-filter>
    <action android:name="android.intent.action.SEND" />
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="text/plain" />
</intent-filter>
<intent-filter>
    <action android:name="android.intent.action.SEND_MULTIPLE" />
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="image/*" />
</intent-filter>
    </activity>
    <!-- FullImageActivity -->
    <activity android:name=".FullImageActivity"></activity>
    <activity android:name=".About" android:theme="@android:style/Theme.Dialog">  </activity>
</application>

指导我如何将共享链接添加到此应用程序，我尝试了很多方法但最终都出错了。

Answer 1

您可以在 UI 元素的任何点击事件中使用它。

BitmapDrawable bm = (BitmapDrawable) yourImageView.getDrawable();
Bitmap mysharebmp = bm.getBitmap();
String path = Images.Media.insertImage(getContentResolver(),
                    mysharebmp, "MyImage", null);
Uri uri = Uri.parse(path);
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setType("image/png");
sharingIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(Intent.createChooser(sharingIntent,
                    "Share image using"));