Question

我从网址获取图片并在imageView上显示。此功能正常运行。但我希望当我点击该图像时，它必须是全屏的。那么如何实现这一功能呢？我知道我错过了什么。请帮我。屏幕截图已附上。我也想在我的应用程序中使用相同的功能。

Before clicking After clicking

这是我的代码，我正在尝试图片点击：

    @Override
    public void onClick(View v) {
        if (isTouch1) {
            horizontalScrollView.setVisibility(View.GONE);
            isTouch1 = false;
            // mSystemUiHider.toggle();
            setTheme(R.style.FullscreenTheme);
            Log.d("Here isTouch is true", ">");
            // ChangeThemeUtils.changeToTheme(FullScreenImageAdapter.this, ChangeThemeUtils.THEME_HIDE_ALL_WINDOW);
            getSupportActionBar().hide();

        } else {
            isTouch1 = true;
            horizontalScrollView.setVisibility(View.VISIBLE);
            getSupportActionBar().show();
            setTheme(R.style.ExampleTheme);
            //mSystemUiHider.show();
            Log.d("Here isTouch is false", ">");    
        }
    }

Answer 1

您可以使用以下两个属性下方的ImageView根据您的要求显示图片：

android:adjustViewBounds：如果您希望ImageView调整其边界以保持其drawable的宽高比，请将此设置为true。

android:scaleType：控制如何调整图像大小或移动图像以匹配此ImageView的大小

<ImageView
    android:id="@+id/imageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:adjustViewBounds="true"
    android:src="@drawable/ic_launcher"/>

以上两个属性可以使用xml或java代码。

由于您需要在运行时决定是否需要将图像显示为全屏，因此将在Java代码上面应用以下两个属性，如下所示：

public class MainActivity extends Activity {

    ImageView imageView;

    boolean isImageFitToScreen;

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

        imageView = (ImageView) findViewById(R.id.imageView);

        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(isImageFitToScreen) {
                    isImageFitToScreen=false;
                    imageView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));
                    imageView.setAdjustViewBounds(true);
                }else{
                    isImageFitToScreen=true;
                    imageView.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT));
                    imageView.setScaleType(ImageView.ScaleType.FIT_XY);
                }
            }
        });

    }
}

Answer 2

使用沉浸式全屏模式

在fullScreen()点击时致电ImageView。

 public void fullScreen() {

        // BEGIN_INCLUDE (get_current_ui_flags)
        // The UI options currently enabled are represented by a bitfield.
        // getSystemUiVisibility() gives us that bitfield.
        int uiOptions = getWindow().getDecorView().getSystemUiVisibility();
        int newUiOptions = uiOptions;
        // END_INCLUDE (get_current_ui_flags)
        // BEGIN_INCLUDE (toggle_ui_flags)
        boolean isImmersiveModeEnabled =
                ((uiOptions | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY) == uiOptions);
        if (isImmersiveModeEnabled) {
            Log.i(TAG, "Turning immersive mode mode off. ");
        } else {
            Log.i(TAG, "Turning immersive mode mode on.");
        }

        // Navigation bar hiding:  Backwards compatible to ICS.
        if (Build.VERSION.SDK_INT >= 14) {
            newUiOptions ^= View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
        }

        // Status bar hiding: Backwards compatible to Jellybean
        if (Build.VERSION.SDK_INT >= 16) {
            newUiOptions ^= View.SYSTEM_UI_FLAG_FULLSCREEN;
        }

        // Immersive mode: Backward compatible to KitKat.
        // Note that this flag doesn't do anything by itself, it only augments the behavior
        // of HIDE_NAVIGATION and FLAG_FULLSCREEN.  For the purposes of this sample
        // all three flags are being toggled together.
        // Note that there are two immersive mode UI flags, one of which is referred to as "sticky".
        // Sticky immersive mode differs in that it makes the navigation and status bars
        // semi-transparent, and the UI flag does not get cleared when the user interacts with
        // the screen.
        if (Build.VERSION.SDK_INT >= 18) {
            newUiOptions ^= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
        }

        getWindow().getDecorView().setSystemUiVisibility(newUiOptions);
        //END_INCLUDE (set_ui_flags)
    }

阅读more

示例Download

Answer 3

使用ImageView的以下属性来获取完整大小的图像

 android:scaleType="fitXY"

前：

      <ImageView
        android:id="@+id/tVHeader2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitXY"
        android:gravity="center"
        android:src="@drawable/done_sunheading" />

1）点击图片时打开其他活动。

2）在意图中传递网址

3）对该活动进行imageview并设置imageview的上述属性

4）从意图中获取网址并设置该图像。

但使用此图片时，如果尺寸较小，您的图片可能会被加盖。

Answer 4

这对我没有用，我在网上使用了一些代码部分，我做了什么：

新活动： FullScreenImage ：

package yourpackagename;
import yourpackagename.R;


import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class FullScreenImage  extends Activity {


@SuppressLint("NewApi")



@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.layout_full);

    Bundle extras = getIntent().getExtras();
    Bitmap bmp = (Bitmap) extras.getParcelable("imagebitmap");

    ImageView imgDisplay;
    Button btnClose;


    imgDisplay = (ImageView) findViewById(R.id.imgDisplay);
    btnClose = (Button) findViewById(R.id.btnClose);


   btnClose.setOnClickListener(new View.OnClickListener() {            
    public void onClick(View v) {
    FullScreenImage.this.finish();
}
});


 imgDisplay.setImageBitmap(bmp );

}   


}

然后创建一个xml： layout_full

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

<ImageView
    android:id="@+id/imgDisplay"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:scaleType="fitCenter" />

<Button
    android:id="@+id/btnClose"
    android:layout_width="wrap_content"
    android:layout_height="30dp"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_marginRight="15dp"
    android:layout_marginTop="15dp"
    android:paddingTop="2dp"
    android:paddingBottom="2dp"
    android:textColor="#ffffff"
    android:text="Close" />

   </RelativeLayout>

最后，从您的主要活动

发送图片名称

   final ImageView im = (ImageView)findViewById(R.id.imageView1) ; 
   im.setBackgroundDrawable(getResources().getDrawable(id1));

   im.setOnClickListener(new OnClickListener() {

      @Override
       public void onClick(View view) {
       Intent intent = new Intent(NAMEOFYOURCURRENTACTIVITY.this, FullScreenImage.class);

       im.buildDrawingCache();
       Bitmap image= im.getDrawingCache();

       Bundle extras = new Bundle();
       extras.putParcelable("imagebitmap", image);
       intent.putExtras(extras);
       startActivity(intent);

                                }
                            });

Answer 5

将此属性用于图像视图，例如

1）android:scaleType="fitXY" - 这意味着图片将被拉伸以适合基于您ImageView的父级的所有方面！

2）通过使用上述属性，它会影响您的图像分辨率，因此如果您想保持分辨率，则添加android:scaleType="centerInside"等属性。

Answer 6

是的我得到了诀窍。

public void onClick(View v) {

            if( Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH ){
                imgDisplay.setSystemUiVisibility( View.SYSTEM_UI_FLAG_HIDE_NAVIGATION );

            }
            else if( Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB )
                imgDisplay.setSystemUiVisibility( View.STATUS_BAR_HIDDEN );
            else{}

    }

但它并没有完全解决我的问题。我也想隐藏水平滚动视图，它位于imageView（下方）的前面，不能隐藏在这里。

Answer 7

public class MainActivity extends Activity {

ImageView imgV;

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

    imgV= (ImageView) findViewById("your Image View Id");

    imgV.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
                imgV.setScaleType(ScaleType.FIT_XY);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
getSupportActionBar().hide();
            }
        }
    });

}
}

Answer 8

 final ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView);          

        PhotoViewAttacher photoAttacher;
        photoAttacher= new PhotoViewAttacher(imageView);
        photoAttacher.update();

        Picasso.with(ImageGallery.this).load(imageUrl).placeholder(R.drawable.lwt_placeholder)
                .into(imageView);

活动中

-Param1Name 'Param1value' -param2Name param2value -verbose

就这样！

Answer 9

实际上，有三种方法可以启用完全加密，请访问：https://developer.android.com/training/system-ui/immersive

但是，如果您想在活动打开时获得全屏显示，只需将这段代码放在your_activity.java

中

@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    if (hasFocus) {
        hideSystemUI();
    }
}

private void hideSystemUI() {
    // Enables regular immersive mode.
    // For "lean back" mode, remove SYSTEM_UI_FLAG_IMMERSIVE.
    // Or for "sticky immersive," replace it with SYSTEM_UI_FLAG_IMMERSIVE_STICKY
    View decorView = getWindow().getDecorView();
    decorView.setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_IMMERSIVE
            // Set the content to appear under the system bars so that the
            // content doesn't resize when the system bars hide and show.
            | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            // Hide the nav bar and status bar
            | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
            | View.SYSTEM_UI_FLAG_FULLSCREEN);
}

// Shows the system bars by removing all the flags
// except for the ones that make the content appear under the system bars.
private void showSystemUI() {
    View decorView = getWindow().getDecorView();
    decorView.setSystemUiVisibility(
            View.SYSTEM_UI_FLAG_LAYOUT_STABLE
            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
            | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
}

Answer 10

要实现这一点很容易，就是使用这样的Intent ：（我将方法放在自定义类中，该类将Activity作为参数，因此可以从任何Fragment或Activity中调用它）

    public class UIutils {

private Activity mActivity;

    public UIutils(Activity activity){
        mActivity = activity;
    }

public void showPhoto(Uri photoUri){
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        intent.setDataAndType(photoUri, "image/*");
        mActivity.startActivity(intent);
    }
}

然后使用它即可：

imageView.setOnClickListener(v1 -> new UIutils(getActivity()).showPhoto(Uri.parse(imageURI)));

我将其与图像URL一起使用，但也可以与存储的文件一起使用。如果要从手机存储器访问图像，则应使用内容提供商。

如何在imageView上单击显示imageView全屏？

10 个答案: