Android(安卓)自定义显示图片Dialog

效果图：

布局文件

<?xml version="1.0" encoding="utf-8"?><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">    <ImageView        android:id="@+id/imageView"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerInParent="true"        tools:ignore="ContentDescription" /></RelativeLayout>

新建style样式

<style name="ShowImageDialog" parent="@android:style/Theme.Dialog">        <item name="android:windowIsFloating">true</item>        <item name="android:windowIsTranslucent">true</item>        <item name="android:windowNoTitle">true</item>        <item name="android:windowBackground">@android:color/transparent</item>        <item name="android:background">@android:color/transparent</item>        <item name="android:backgroundDimEnabled">true</item>    </style>

新建ShowImageDialog继承Dialog：

import android.annotation.SuppressLint;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.ImageView;public class DzShowImageDialog extends Dialog {    private Object showImage;    public DzShowImageDialog(Context context, Object showImage) {        super(context, R.style.ShowImageDialog);        this.showImage = showImage;    }    @SuppressLint("ResourceType")    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.dialog_showimage);        ImageView imageView = findViewById(R.id.imageView);        MyCommon.setViewContent(imageView, showImage);        setCanceledOnTouchOutside(true); // 设置点击屏幕或物理返回键，dialog是否消失        Window w = getWindow();        assert w != null;        WindowManager.LayoutParams lp = w.getAttributes();        lp.x = 0;        lp.y = 40;        onWindowAttributesChanged(lp);        imageView.setOnClickListener(                new View.OnClickListener() {                    @Override                    public void onClick(View view) {                        dismiss();                    }                });    }}

附MyCommon方法

/** * 设置 ImageView 的显示内容。 *  * @param content *            支持 null，Integer(ResID)，Bitmap，Drawable。 */public static boolean setViewContent(ImageView view, Object content) {if (view == null)return false;Object tagValue = getTagValue(content);if (view.getTag(R.string.setTagKey_content).equse(tagValue))return view.getDrawable() != null;view.setTag(R.string.setTagKey_content, tagValue);Drawable real = getDrawable(view, content);view.setImageDrawable(real);return (real != null);}/** * 为指定 View 准备其需要使用的 Drawable 对象。 */@SuppressWarnings("deprecation")public static Drawable getDrawable(View view, Object drawable) {if (view == null)return null;if (drawable == null)return null;Drawable real = null;try {if (drawable instanceof DzInteger)drawable = ((DzInteger) drawable).value;if (drawable instanceof Integer) {int resId = (Integer) drawable;if (resId == 0)return null;real = view.getResources().getDrawable(resId);} else if (drawable instanceof Drawable) {real = (Drawable) drawable;} else if (drawable instanceof Bitmap) {real = new BitmapDrawable(view.getResources(), (Bitmap) drawable);}} catch (Throwable e) {Log.e("", "MyCommon.getViewDrawable(.., ..) failed for %s", e.toString());}// 需要设置一下，否则在 TextView 中显示不出来if (real != null) {real.setBounds(0, 0, real.getMinimumWidth(), real.getMinimumHeight());}return real;}

使用示例

使用的话只需要调用 new ShowImageDialog(context , 图片).show(); 即可。

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