android - 在 Android 中更改方向时布局会损坏

标签 android layout orientation landscape

我正在开发用于显示 channel 直播的应用程序，默认情况下它以横向模式启动，我可以从选项菜单将其更改为纵向，反之亦然

现在我在 list 中使用此代码并将其放入该 Activity 中 android:configChanges="keyboard|keyboardHidden|orientation|screenSize"

当我启动应用程序时，它工作正常，但当我将方向更改为纵向时，应用程序会挂起，并且选项菜单不会像平常一样消失。

如果我从 list 中删除了这部分|screenSize，它工作正常，但布局区域不起作用，并且在两个方向上都使用纵向布局。

这是LiveActivity.java

package com.shadatv.shada;

import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;

import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;

import android.view.Menu;
import android.view.MenuItem;

import android.view.WindowManager;

import android.widget.VideoView;

public class LiveActivity extends Activity {
    VideoView videoView;

    private AlertDialog.Builder errorDialog;
    String httpLiveUrl = "http://38.96.148.147:1935/live/livestream/playlist.m3u8";

    // =============================================================================

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
        }
        setContentView(R.layout.live);
        try {
            videoView = (VideoView) findViewById(R.id.myVideoView);
            videoView.setVideoURI(Uri.parse(httpLiveUrl));
            videoView.requestFocus();

            videoView
                    .setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

                        @Override
                        public void onPrepared(MediaPlayer mp) {
                            // TODO Auto-generated method stub

                            videoView.seekTo(1000);
                            videoView.start();

                        }
                    });

        } catch (Exception e) {
            errorDialog = new AlertDialog.Builder(this);
            errorDialog.setMessage("مشكلة في البث");
            errorDialog.setCancelable(true);
            errorDialog.setNeutralButton("Ok",
                    new DialogInterface.OnClickListener() {
                        // click listener on the alert box
                        public void onClick(DialogInterface arg0, int arg1) {

                        }
                    });
            AlertDialog errorStream = errorDialog.create();
            errorStream.show();
        }
    }

    // =============================================================================

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        menu.clear();
        getMenuInflater().inflate(R.menu.activity_shada, menu);
        MenuItem fullItem = menu.findItem(R.id.fullScreen);
        MenuItem smallItem = menu.findItem(R.id.smallScreen);

        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            fullItem.setVisible(false);
            smallItem.setVisible(true);
        } else if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
            smallItem.setVisible(false);
            fullItem.setVisible(true);
        }
        return super.onPrepareOptionsMenu(menu);
    }

    // =============================================================================

    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            getWindow().clearFlags(
                    WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);
            // setContentView(R.layout.activity_shada);
        } else if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
            getWindow().setFlags(
                    WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
            // setContentView(R.layout.activity_shada1);
        }
    }

    // =============================================================================

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.about: {
            // TODO Auto-generated method stub
            startActivity(new Intent("com.shadatv.MainActivity"));
        }
            break;

        case R.id.smallScreen: {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        }
            break;

        case R.id.fullScreen: {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        }
            break;
        }
        return true;
    }

}

list .xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.shadatv.shada"
    android:versionCode="3"
    android:versionName="1.0.2" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/shada"
        android:label="@string/app_name"

        >       
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <activity
            android:name=".LiveActivity"
            android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
            android:exported="false"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >

            <intent-filter>
                <action android:name="com.shadatv.LiveActivity" />

                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>


</manifest>

最佳答案

我通过从 onCreate 中取出 setContentView 和 try/catch block 并将其放入 onConfigChanged 来解决这个问题

package com.shadatv.shada;

import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;

import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;

import android.view.Menu;
import android.view.MenuItem;

import android.view.WindowManager;

import android.widget.VideoView;

public class LiveActivity extends Activity {
    VideoView videoView;

    private AlertDialog.Builder errorDialog;
    String httpLiveUrl = "http://38.96.148.147:1935/live/livestream/playlist.m3u8";

    // =============================================================================

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        // if (getResources().getConfiguration().orientation ==
        // Configuration.ORIENTATION_LANDSCAPE) {
        // getWindow().clearFlags(
        // WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
        // getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
        // WindowManager.LayoutParams.FLAG_FULLSCREEN);
        // }
        // setContentView(R.layout.live);

    }

    // =============================================================================

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        menu.clear();
        getMenuInflater().inflate(R.menu.activity_shada, menu);
        MenuItem fullItem = menu.findItem(R.id.fullScreen);
        MenuItem smallItem = menu.findItem(R.id.smallScreen);

        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            fullItem.setVisible(false);
            smallItem.setVisible(true);
        } else if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
            smallItem.setVisible(false);
            fullItem.setVisible(true);
        }
        return super.onPrepareOptionsMenu(menu);
    }

    // =============================================================================

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        setContentView(R.layout.live);
        try {
            videoView = (VideoView) findViewById(R.id.myVideoView);
            videoView.setVideoURI(Uri.parse(httpLiveUrl));
            videoView.requestFocus();

            videoView
                    .setOnPreparedListener(new MediaPlayer.OnPreparedListener() {

                        @Override
                        public void onPrepared(MediaPlayer mp) {
                            // TODO Auto-generated method stub

                            videoView.seekTo(1000);
                            videoView.start();

                        }
                    });

        } catch (Exception e) {
            errorDialog = new AlertDialog.Builder(this);
            errorDialog.setMessage("مشكلة في البث");
            errorDialog.setCancelable(true);
            errorDialog.setNeutralButton("Ok",
                    new DialogInterface.OnClickListener() {
                        // click listener on the alert box
                        public void onClick(DialogInterface arg0, int arg1) {

                        }
                    });
            AlertDialog errorStream = errorDialog.create();
            errorStream.show();
        }

        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            getWindow().clearFlags(
                    WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FULLSCREEN);    
        } else if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
            getWindow().setFlags(
                    WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN,
                    WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
        }
    }

    // =============================================================================

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case R.id.about:
            // TODO Auto-generated method stub
            startActivity(new Intent("com.shadatv.MainActivity"));
            break;

        case R.id.smallScreen:
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            break;

        case R.id.fullScreen:
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
            break;
        }
        return true;
    }

}

但是我在选项菜单中发现了另一个问题。当我按“关于”按钮退出此 Activity 并运行 MainActivity 时，应用程序将停止。怎么了？

关于android - 在 Android 中更改方向时布局会损坏，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15331643/

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