我已经发布了java代码和活动的快照。相机选项卡有一个按钮和imagepreview小部件。相机功能正常。如何将图片保存在名为图片的特定文件夹中。而且我没有预览图片。
这是我的java代码:
public class activities extends AppCompatActivity {
public static final int CAPTURE_IMAGE_FULLSIZE_ACTIVITY_REQUEST_CODE = 1777;
ImageView imgPreview;
Button btnCapturePicture;
File file;
static int count=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activities);
TabHost th=(TabHost)findViewById(R.id.tabHost);
th.setup();
TabHost.TabSpec specs=th.newTabSpec("Tag1");
specs.setContent(R.id.camera);
specs.setIndicator("",getResources().getDrawable(R.drawable.camera));
th.addTab(specs);
specs=th.newTabSpec("Tag2");
specs.setContent(R.id.chat);
specs.setIndicator("",getResources().getDrawable(R.drawable.chat15));
th.addTab(specs);
specs=th.newTabSpec("Tag3");
specs.setContent(R.id.profile);
specs.setIndicator("",getResources().getDrawable(R.drawable.ic_person_black_24dp));
th.addTab(specs);
specs=th.newTabSpec("Tag4");
specs.setContent(R.id.history);
specs.setIndicator("",getResources().getDrawable(R.drawable.history2));
th.addTab(specs);
specs=th.newTabSpec("Tag5");
specs.setContent(R.id.settings);
specs.setIndicator("",getResources().getDrawable(R.drawable.settings5));
th.addTab(specs);
imgPreview = (ImageView)findViewById(R.id.imageview6);
btnCapturePicture=(Button)findViewById(R.id.btnCapturePicture);
btnCapturePicture.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
file = new File(Environment.getExternalStorageDirectory()+ File.separator + "IMG_"+count+++".jpg");
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
startActivityForResult(intent, CAPTURE_IMAGE_FULLSIZE_ACTIVITY_REQUEST_CODE);
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
//Check that request code matches ours:
if (requestCode == CAPTURE_IMAGE_FULLSIZE_ACTIVITY_REQUEST_CODE)
{
//Get our saved file into a bitmap object:
File file = new File(Environment.getExternalStorageDirectory()+File.separator + "IMG_"+count+++".jpg");
Bitmap bitmap = decodeSampledBitmapFromFile(file.getAbsolutePath(), 1000, 700);
imgPreview.setImageBitmap(bitmap);
}
}
public static Bitmap decodeSampledBitmapFromFile(String path, int reqWidth, int reqHeight)
{ // BEST QUALITY MATCH
//First decode with inJustDecodeBounds=true to check dimensions
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
// Calculate inSampleSize, Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
options.inPreferredConfig = Bitmap.Config.RGB_565;
int inSampleSize = 1;
if (height > reqHeight)
{
inSampleSize = Math.round((float)height / (float)reqHeight);
}
int expectedWidth = width / inSampleSize;
if (expectedWidth > reqWidth)
{
//if(Math.round((float)width / (float)reqWidth) > inSampleSize) // If bigger SampSize..
inSampleSize = Math.round((float)width / (float)reqWidth);
}
options.inSampleSize = inSampleSize;
// Decode bitmap with inSampleSize set
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(path, options);
}
}
这是我的xml布局:
<LinearLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:background="#eeeeee"
android:orientation="vertical"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android">
<android.support.design.widget.AppBarLayout
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<!--<android.support.v7.widget.Toolbar
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
android:layout_width="match_parent"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
android:id="@+id/toolbar"/>-->
</android.support.design.widget.AppBarLayout>
<TabHost
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/tabHost"
android:layout_gravity="center_horizontal">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true">
</TabWidget>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="@+id/camera"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="350dp"
android:layout_gravity="center_horizontal"
android:layout_marginTop="50dp"
android:id="@+id/imageview6" />
<Button
android:id="@+id/btnCapturePicture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Take a Picture"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="10dp" />
</LinearLayout>
<LinearLayout
android:id="@+id/chat"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>
<LinearLayout
android:id="@+id/profile"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:layout_width="150dp"
android:layout_height="150dp"
android:id="@+id/imageView3"
android:layout_gravity="center_horizontal"
android:layout_marginTop="46dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:weightSum="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"
android:text="Name"
android:id="@+id/textView13"
android:layout_gravity="center_vertical" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="end"
android:layout_marginStart="20dp"
android:layout_gravity="center_vertical"
android:id="@+id/textView18" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view1"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Grade"
android:textSize="18sp"
android:id="@+id/textView14"
android:layout_gravity="center_vertical" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="New Text"
android:layout_marginStart="20dp"
android:layout_gravity="center_vertical"
android:gravity="end"
android:id="@+id/textView19" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view2"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Credit Balance"
android:layout_gravity="center_vertical"
android:id="@+id/textView15"
android:textSize="18sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="New Text"
android:layout_gravity="center_vertical"
android:gravity="end"
android:layout_marginStart="20dp"
android:id="@+id/textView20" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view3"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Invite Friends"
android:layout_gravity="center_vertical"
android:id="@+id/textView16"
android:textSize="18sp" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView4"
android:src="@drawable/invite"
android:layout_marginStart="213dp"
android:layout_gravity="center_vertical"
android:foregroundGravity="right"
android:layout_marginEnd="3dp" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view4"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Change Password"
android:id="@+id/textView17"
android:textSize="18sp"
android:layout_gravity="center_vertical" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/imageView5"
android:src="@drawable/change_passg"
android:layout_gravity="center_vertical"
android:layout_marginEnd="0dp"
android:layout_marginStart="170dp" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view5"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
</LinearLayout>
<LinearLayout
android:id="@+id/history"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
</LinearLayout>
<LinearLayout
android:id="@+id/settings"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="40dp">
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view6"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:gravity="center"
android:textSize="18sp"
android:text="Add Credits"
android:id="@+id/textView21" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view7"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:gravity="center"
android:textSize="18sp"
android:text="Report Issue"
android:id="@+id/textView22" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view8"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:gravity="center"
android:text="Rate Us"
android:textSize="18sp"
android:id="@+id/textView23" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view9"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:gravity="center"
android:textSize="18sp"
android:text="FAQ"
android:id="@+id/textView24" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view10"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center_vertical"
android:gravity="center"
android:text="Feedback"
android:textSize="18sp"
android:id="@+id/textView25" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:id="@+id/view11"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#bdbdbd">
</View>
<Button
android:layout_width="150dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:text="Logout"
android:textColor="#FFFFFF"
android:background="@color/colorPrimary"
android:textSize="18sp"
android:id="@+id/button6" />
</LinearLayout>
</FrameLayout>
</RelativeLayout>
</TabHost>
截图: