res / drawableフォルダーから画像を表示し、それをimageviewに配置する必要があります。私はいくつかの調査を行い、それらを実装しました。空白の画面のみが表示され、画像は表示されません。
私のxmlコード:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/mainlayout"
/>
</LinearLayout>
Javaコード:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle extras = getIntent().getExtras();
if (extras != null) {
String value = extras.getString("FaType");
if(value.equals("AnimalBite"))
{
LinearLayout mainLayout = (LinearLayout)findViewById(R.id.mainlayout);
ImageView imageView = new ImageView(this);
imageView.setImageResource(R.drawable.medrem);
LayoutParams imageViewLayoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
imageView.setLayoutParams(imageViewLayoutParams);
mainLayout.addView(imageView);
}
}
CATLOG
08-21 20:54:35.698: E/Trace(684): error opening trace file: No such file or directory (2)
08-21 20:54:36.618: D/dalvikvm(684): GC_FOR_ALLOC freed 227K, 4% free 8142K/8455K, paused 123ms, total 142ms
08-21 20:54:36.948: D/dalvikvm(684): GC_CONCURRENT freed 196K, 4% free 8383K/8711K, paused 35ms+25ms, total 138ms
08-21 20:54:37.978: I/Choreographer(684): Skipped 199 frames! The application may be doing too much work on its main thread.
08-21 20:54:38.158: D/gralloc_goldfish(684): Emulator without GPU emulation detected.
08-21 20:54:39.318: I/Choreographer(684): Skipped 64 frames! The application may be doing too much work on its main thread.
08-21 20:54:47.318: I/Choreographer(684): Skipped 77 frames! The application may be doing too much work on its main thread.
08-21 20:54:48.138: I/Choreographer(684): Skipped 45 frames! The application may be doing too much work on its main thread.
08-21 20:54:49.798: D/AndroidRuntime(684): Shutting down VM
08-21 20:54:49.798: W/dalvikvm(684): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
08-21 20:54:49.848: E/AndroidRuntime(684): FATAL EXCEPTION: main
08-21 20:54:49.848: E/AndroidRuntime(684): java.lang.RuntimeException: Unable to start activity ComponentInfo{dr.droid/dr.droid.ImageViewer}: java.lang.NullPointerException
08-21 20:54:49.848: E/AndroidRuntime(684): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.app.ActivityThread.access$600(ActivityThread.java:130)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.os.Handler.dispatchMessage(Handler.java:99)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.os.Looper.loop(Looper.java:137)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.app.ActivityThread.main(ActivityThread.java:4745)
08-21 20:54:49.848: E/AndroidRuntime(684): at java.lang.reflect.Method.invokeNative(Native Method)
08-21 20:54:49.848: E/AndroidRuntime(684): at java.lang.reflect.Method.invoke(Method.java:511)
08-21 20:54:49.848: E/AndroidRuntime(684): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
08-21 20:54:49.848: E/AndroidRuntime(684): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
08-21 20:54:49.848: E/AndroidRuntime(684): at dalvik.system.NativeStart.main(Native Method)
08-21 20:54:49.848: E/AndroidRuntime(684): Caused by: java.lang.NullPointerException
08-21 20:54:49.848: E/AndroidRuntime(684): at dr.droid.ImageViewer.onCreate(ImageViewer.java:29)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.app.Activity.performCreate(Activity.java:5008)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
08-21 20:54:49.848: E/AndroidRuntime(684): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
08-21 20:54:49.848: E/AndroidRuntime(684): ... 11 more
08-21 20:54:52.268: I/Process(684): Sending signal. PID: 684 SIG: 9
何か案は?このコードの問題も知る必要があります。ドローアブルフォルダに画像を追加して、これで使用しようとするときはいつでも
imageView.setImageResource(R.drawable.medrem)
画像を認識していないようです。助けてください?