Question

我昨天一直在努力尝试在我的应用程序中插入我的徽标图像。但没有运气。我正在使用ImageView，我正在应用来自互联网的所有建议，我已经建立了50多个APK来测试它，并且每次都是失败。

我的图片是drawable-nodpi，drawable-xdpi，drawable-xxdpi，drawable-xxxdpi和mipmap等。此外，我尝试了不同格式的图像和大小。我最后一张图片尺寸是 300x408px 在Android Studio上显示图像但不在任何设备或平板电脑上显示。这是源代码

文件 main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:weightSum="0">

<ImageView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:srcCompat="@drawable/logo"
    android:id="@+id/imageView4" />

<Button
    android:id="@+id/play"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_margin="10dip"
    android:text="Pusti" />

<Button
    android:id="@+id/stop"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_margin="10dip"
    android:text="Zaustavi" />

<ImageView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:srcCompat="@mipmap/tower"
    android:id="@+id/imageView3" />

文件 MusicAndroidActivity.java

    package clever.radio;

import java.io.IOException;

import android.app.Activity;
import android.graphics.BitmapFactory;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.webkit.WebView;
import android.widget.Button;
import android.widget.Toast;

import static android.R.attr.id;

public class MusicAndroidActivity extends Activity {

    static MediaPlayer mPlayer;
    Button buttonPlay;
    Button buttonStop;
    String url = "http://radioclever.stream:8000/stream";
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        buttonPlay = (Button) findViewById(R.id.play);
        buttonPlay.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                mPlayer = new MediaPlayer();
                mPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                try {
                    mPlayer.setDataSource(url);
                } catch (IllegalArgumentException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                } catch (SecurityException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                } catch (IllegalStateException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                try {
                    mPlayer.prepare();
                } catch (IllegalStateException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                } catch (IOException e) {
                    Toast.makeText(getApplicationContext(), "You might not set the URI correctly!", Toast.LENGTH_LONG).show();
                }
                mPlayer.start();
            }
        });

        buttonStop = (Button) findViewById(R.id.stop);
        buttonStop.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(mPlayer!=null && mPlayer.isPlaying()){
                    mPlayer.stop();
                }
            }
        });
    }

    protected void onDestroy() {
        super.onDestroy();
        // TODO Auto-generated method stub
        if (mPlayer != null) {
            mPlayer.release();
            mPlayer = null;
        }
    }
}

文件 AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="clever.radio"
android:versionCode="1"
android:versionName="1.1" >

<uses-sdk
    android:minSdkVersion="9"
    android:targetSdkVersion="15" />

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

<application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MusicAndroidActivity" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

的strings.xml

<resources>
    <string name="app_name">Radio Clever</string>
</resources>

和 dimens.xml

<resources>
    <!-- Default screen margins, per the Android Design guidelines. -->
    <dimen name="activity_horizontal_margin">16dp</dimen>
    <dimen name="activity_vertical_margin">16dp</dimen>
</resources>

Answer 1

尝试android:src app:srcCompat。{/ p>

Answer 2

请检查findViewById for Imageview。

如果没有它，你就没有得到Imageview。

将徽标图像插入应用程序

2 个答案: