创建类似壁纸的应用时出现问题。
首先，我使用了导航抽屉，然后使用我在代码
之后编写的一个项目所以我的问题是，当我分享图像时，唯一的第一张图像是共享的，而不是我从视图分页器中选择的图像。
MainActivity.java
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
GridView lv2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
lv2= (GridView) findViewById(R.id.gridView1);
// / Listening to GridView item click
lv2.setAdapter(new ImageViewPager.ImageAdapter1(getApplicationContext()));
lv2.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Intent i = new Intent(getApplicationContext(), ImageViewPager.class);
i.putExtra("id", position);
startActivity(i);
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setItemIconTintList(null);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@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;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
FragmentManager fragmentManager=getSupportFragmentManager();
//noinspection SimplifiableIfStatement
if (id==R.id.abt_us)
{
About_Us about_us=new About_Us();
fragmentManager.beginTransaction().replace(R.id.container,about_us).commit();
}
else if (id==R.id.rt_us)
{
Rate_Us.app_launched(this);
}
else if (id==R.id.exit)
{
finish();
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.all) {
lv2.setAdapter(new ImageViewPager.ImageAdapter1(getApplicationContext()));
lv2.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Intent i = new Intent(getApplicationContext(), ImageViewPager.class);
i.putExtra("id", position);
startActivity(i);
}
});
}
else if (id == R.id.animal) {
lv2.setAdapter(new ImageAdapter2(this));
// lv2.setAdapter(new ImageAdapter2(getApplicationContext()));
lv2.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Intent i = new Intent(getApplicationContext(), ImageExample.class);
i.putExtra("id", position);
startActivity(i);
}
});
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
ImageAdapter2.java
public class ImageAdapter2 extends BaseAdapter {
private Context mContext;
public ImageAdapter2(Context c)
{
mContext = c;
}
public int getCount()
{
return mThumbIds1.length;
}
public Object getItem(int position)
{
int imageId=position;
return imageId;
// return mThumbIds1[position];
}
public long getItemId(int position) {
return 0;
}
// Create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null)
{
imageView = new ImageView(mContext);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
}
else
{
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds1[position]);
return imageView;
}
// References to our images in res > drawable
public Integer[] mThumbIds1 = {
R.drawable.images, R.drawable.images2,
R.drawable.images3, R.drawable.images4,
R.drawable.images5, R.drawable.images6,
R.drawable.images7
};
}
ImageExample.java
public class ImageExample extends Activity {
// Declare Variable
int position;
Button stwp,share,save,like,shareFace,shareWhats;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Set title for the ViewPager
setTitle("ViewPager");
// Get the view from view_pager.xml
setContentView(R.layout.image_animal);
stwp= (Button) findViewById(R.id.setwall);
share= (Button) findViewById(R.id.shareWall);
save= (Button) findViewById(R.id.saveWall);
like= (Button) findViewById(R.id.likeWall);
// Retrieve data from MainActivity on item click event
Intent p = getIntent();
position = p.getExtras().getInt("id");
final ImageAdapter2 imageAdapter = new ImageAdapter2(this);
final List<ImageView> images = new ArrayList<ImageView>();
// Retrieve all the images
for (int i = 0; i < imageAdapter.getCount(); i++) {
ImageView imageView = new ImageView(this);
imageView.setImageResource(imageAdapter.mThumbIds1[i]);
imageView.setScaleType(ImageView.ScaleType.CENTER);
images.add(imageView);
}
// Set the images into ViewPager
ImagePagerAdapter pageradapter = new ImagePagerAdapter(images);
ViewPager viewpager = (ViewPager) findViewById(R.id.pager);
viewpager.setAdapter(pageradapter);
viewpager.setCurrentItem(position);
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Bitmap bm;
OutputStream output;
bm = BitmapFactory.decodeResource(getResources(), imageAdapter.mThumbIds1[position]);
File filepath = Environment.getExternalStorageDirectory();
File dir = new File(filepath.getAbsolutePath() +"/Image Example/");
dir.mkdirs();
File file = new File(dir, "Image.jpg");
try {
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setAction(Intent.ACTION_SEND);
sharingIntent.setType("image/jpg");
output = new FileOutputStream(file);
bm.compress(Bitmap.CompressFormat.JPEG, 100, output);
output.flush();
output.close();
Uri uri = Uri.fromFile(file);
sharingIntent.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(sharingIntent);
} catch (FileNotFoundException e) {
e.printStackTrace();
Toast.makeText(ImageExample.this, "unable to share..!", Toast.LENGTH_SHORT).show();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}
ImagePagerAdapter.java
public class ImagePagerAdapter extends PagerAdapter {
private List<ImageView> images;
public ImagePagerAdapter(List<ImageView> images) {
this.images = images;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imageView = images.get(position);
container.addView(imageView);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView(images.get(position));
}
@Override
public int getCount() {
return images.size();
}
@Override
public boolean isViewFromObject(View view, Object o) {
return view == o;
}
}
content_main.xml
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/container">
<GridView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnWidth="100dp"
android:numColumns="2"
android:verticalSpacing="2dp"
android:horizontalSpacing="2dp"
android:layout_gravity="center"
android:id="@+id/gridView1">
</GridView>
</FrameLayout>
image_animal.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/pager"
android:background="#24000000"
>
</android.support.v4.view.ViewPager>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:background="#616161"
android:id="@+id/linearLayout">
<Button
android:layout_width="70dp"
android:layout_height="wrap_content"
android:background="@drawable/picture"
android:id="@+id/setwall"
/>
<View
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1" />
<Button
android:layout_width="70dp"
android:layout_height="wrap_content"
android:background="@drawable/sharenew"
android:id="@+id/shareWall"
/>
<View
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1" />
<Button
android:layout_width="70dp"
android:layout_height="wrap_content"
android:background="@drawable/down"
android:id="@+id/saveWall"
/>
<View
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_weight="1" />
<Button
android:layout_width="70dp"
android:layout_height="wrap_content"
android:background="@drawable/likeimage"
android:id="@+id/likeWall"
/>
</LinearLayout>
</RelativeLayout>
和
Menifest
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.a3spl.images2">
<uses-permission android:name="android.permission.SET_WALLPAPER" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity>
android:name=".ImageExample"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
</activity>
答案 0 :(得分：1)
您需要在position按钮点击中将viewpager.getCurrentItem()更改为share：
share.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Bitmap bm;
OutputStream output;
bm = BitmapFactory.decodeResource(getResources(),
imageAdapter.mThumbIds1[viewpager.getCurrentItem()]);
File filepath = Environment.getExternalStorageDirectory();
File dir = new File(filepath.getAbsolutePath() +"/Image Example/");
dir.mkdirs();
// I HAVE MADE CHANGED HERE
File file = new File(dir, "Image_"+System.currentTimeMillis()+".jpg");
// KEEP REST ON THE CODE AS IT WAS
}
});
答案 1 :(得分：0)
你应该尝试在getItemID方法中传递“position”（目前你总是将它传递给0，即第一个索引）。