Question

我开发了一个应用程序，当用户按下按钮时播放音乐。我还开发了一个启动画面和应用程序，它确实与应用程序一起工作。但是，我想修改我的应用程序，以便启动画面播放gif文件而不是常规图像。当我通过创建新项目尝试.gif文件时，它确实有效。我用电影课。我尝试了我的启动画面的意图，以便它调用gif.java文件。但它没有奏效。它只是向我展示了我的gif文件的扭曲图像。并且比它说＆＃34;你的APP已经崩溃了＃34;我的主要java，启动画面和gif .java文件和manifest.xml如下。

Main Java

import android.app.Activity;
import android.content.Intent;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;




    public class MainActivity extends Activity implements OnClickListener {
        private MediaPlayer mp;

       @Override
       public void onCreate(Bundle savedInstanceState) { 
           super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
          setContentView(new MYGIFView (this));
          setVolumeControlStream(AudioManager.STREAM_MUSIC);
          findViewById(R.id.button_1).setOnClickListener(this);
          findViewById(R.id.button_2).setOnClickListener(this);
          findViewById(R.id.button_3).setOnClickListener(this);
       }
       public void onClick(View v) {   
           int resId=1;

       // Release any resources from previous MediaPlayer
          if (mp != null) {   
              mp.release(); 
          } 

          switch (v.getId()) {
          case R.id.button_1: resId = R.raw.button_1; break;
          case R.id.button_2: resId = R.raw.button_2; break;
          case R.id.button_3:
             startActivity(new Intent(MainActivity.this,SecondActivity.class));
             return;

          }

       // Create a new MediaPlayer to play this sound
          mp = MediaPlayer.create(this, resId); 
          mp.start();
       }
    }

启动画面。的java

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

public class SplashScreen extends Activity {

    // Splash screen timer
    private static int SPLASH_TIME_OUT = 3000;

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

        new Handler().postDelayed(new Runnable() {

            /*
             * Showing splash screen with a timer. This will be useful when you
             * want to show case your app logo / company
             */

            @Override
            public void run() {
                // This method will be executed once the timer is over
                // Start your app main activity
                Intent i = new Intent(SplashScreen.this, MYGIFView.class);
                startActivity(i);

                // close this activity
                finish();
            }
        }, SPLASH_TIME_OUT);
    }

}

MYGIF.java

import java.io.InputStream;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Movie;
import android.view.View;

class MYGIFView extends View{

Movie movie,movie1;
InputStream is=null,is1=null;
long moviestart;
public MYGIFView(Context context) {
super(context);




is=context.getResources().openRawResource(R.drawable.th_welcome);
movie=Movie.decodeStream(is);

}

@Override
protected void onDraw(Canvas canvas) {

canvas.drawColor(Color.BLACK);
super.onDraw(canvas);
long now=android.os.SystemClock.uptimeMillis();
System.out.println("now="+now);
if (moviestart == 0) { // first time
moviestart = now;

}
System.out.println("\tmoviestart="+moviestart);
int relTime = (int)((now - moviestart) % movie.duration()) ;
System.out.println("time="+relTime+"\treltime="+movie.duration());
movie.setTime(relTime);
canvas.scale(3.50f, 3.50f);
movie.draw(canvas,20,20);
this.invalidate();
}
}

的Manifest.xml

<uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="11" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >       
        <activity
            android:name=".SplashScreen"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.Black.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <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=".SecondActivity" 
            android:label="@string/app_name"/>
    </application>

</manifest>

Logcat错误

07-24 17:04:36.332: E/AndroidRuntime(580): FATAL EXCEPTION: main

07-24 17:04:36.332: E/AndroidRuntime(580): android.content.ActivityNotFoundException: Unable to find explicit activity class 

{.MYGIFView}; have you declared this activity in your AndroidManifest.xml?
07-24 17:04:36.332: E/AndroidRuntime(580):  at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1508)
07-24 17:04:36.332: E/AndroidRuntime(580):  at android.app.Instrumentation.execStartActivity(Instrumentation.java:1384)
07-24 17:04:36.332: E/AndroidRuntime(580):  at android.app.Activity.startActivityForResult(Activity.java:3190)
07-24 17:04:36.332: E/AndroidRuntime(580):  at android.app.Activity.startActivity(Activity.java:3297)
07-24 17:04:36.332: E/AndroidRuntime(580):  at com.$1.run(SplashScreen.java:29)
07-24 17:04:36.332: E/AndroidRuntime(580):  at android.os.Handler.handleCallback(Handler.java:605)
07-24 17:04:36.332: E/AndroidRuntime(580):  at android.os.Handler.dispatchMessage(Handler.java:92)
07-24 17:04:36.332: E/AndroidRuntime(580):  at android.os.Looper.loop(Looper.java:137)
07-24 17:04:36.332: E/AndroidRuntime(580):  at android.app.ActivityThread.main(ActivityThread.java:4340)
07-24 17:04:36.332: E/AndroidRuntime(580):  at java.lang.reflect.Method.invokeNative(Native Method)
07-24 17:04:36.332: E/AndroidRuntime(580):  at java.lang.reflect.Method.invoke(Method.java:511)
07-24 17:04:36.332: E/AndroidRuntime(580):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
07-24 17:04:36.332: E/AndroidRuntime(580):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
07-24 17:04:36.332: E/AndroidRuntime(580):  at dalvik.system.NativeStart.main(Native Method)

提前致谢..

Answer 1

您的代码正在启动一项新的＆＃34;活动＆＃34;使用MYGIFView类。它似乎应该是一种活动，而不是一种观点。

认为只需要

setContentView(new MYGIFView(this));

在SplashActivity的onCreate中，在处理程序声明之前。并在MainActivity的onCreate中删除它（这似乎是一个错误）。

然后在帖子延迟处理程序中将MyGIFView.class替换为MainActivity.class：

Intent i = new Intent(SplashScreen.this, MainActivity.class);

还需要删除主要活动清单的LAUNCHER和MAIN参数：

<intent-filter>
    <action android:name="android.intent.action.MAIN" />

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

已修改：erata SecondActivity - ＆gt; MainActivity

如何将启动画面与.gif动画文件连接？

1 个答案: