Android program

Question

I have created an android application but it is not running properly. I don't know why it always stops at this line in the console.

[2012年03月29日 13:23:00 - AndroidBitmap] Starting activity com.example.Android.AndroidBitmapActivity on device emulator-5554

My program is as follows, which is code for the rotation of a bitmap package com.example.Android;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.SeekBar;
import android.widget.Spinner;
public class AndroidBitmapActivity extends Activity {
 private final String imageInSD = "/sdcard/er.PNG";
 ImageView myImageView;
 Spinner spinnerScale;
 SeekBar seekbarRotate;
 private static final String[] strScale 
 = {"0.2x", "0.5x", "1.0x", "2.0x", "5.0x"}; 
 private static final Float[] floatScale 
 = {0.2F, 0.5F, 1F, 2F, 5F};
 private final int defaultSpinnerScaleSelection = 2;
 private ArrayAdapter<String> adapterScale;
 private float curScale = 1F;
 private float curRotate = 0F;
 Bitmap bitmap;
 int bmpWidth, bmpHeight;
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.main);
 myImageView = (ImageView)findViewById(R.id.imageview);
 spinnerScale = (Spinner)findViewById(R.id.scale);
 seekbarRotate = (SeekBar)findViewById(R.id.rotate);
 adapterScale = new ArrayAdapter<String>(this,
 android.R.layout.simple_spinner_item, strScale);
 adapterScale.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
 spinnerScale.setAdapter(adapterScale);
 spinnerScale.setSelection(defaultSpinnerScaleSelection);
 curScale = floatScale[defaultSpinnerScaleSelection];
 bitmap = BitmapFactory.decodeFile(imageInSD);
 bmpWidth = bitmap.getWidth();
 bmpHeight = bitmap.getHeight();
 drawMatrix();
 spinnerScale.setOnItemSelectedListener(spinnerScaleOnItemSelectedListener);
 seekbarRotate.setOnSeekBarChangeListener(seekbarRotateSeekBarChangeListener);
 }
 private void drawMatrix(){
 Matrix matrix = new Matrix();
 matrix.postScale(curScale, curScale);
 matrix.postRotate(curRotate);
 Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bmpWidth, bmpHeight, matrix, true);
 myImageView.setImageBitmap(resizedBitmap);
 }
 private SeekBar.OnSeekBarChangeListener seekbarRotateSeekBarChangeListener
 = new SeekBar.OnSeekBarChangeListener(){
 @Override
 public void onProgressChanged(SeekBar seekBar, int progress,
 boolean fromUser) {
 // TODO Auto-generated method stub
 curRotate = (float)progress;
 drawMatrix();
 }
 @Override
 public void onStartTrackingTouch(SeekBar seekBar) {
 // TODO Auto-generated method stub
 }
 @Override
 public void onStopTrackingTouch(SeekBar seekBar) {
 // TODO Auto-generated method stub
 }};
 private Spinner.OnItemSelectedListener spinnerScaleOnItemSelectedListener
 = new Spinner.OnItemSelectedListener(){
 @Override
 public void onItemSelected(AdapterView<?> arg0, View arg1,
 int arg2, long arg3) {
 // TODO Auto-generated method stub
 curScale = floatScale[arg2];
 drawMatrix();
 }
 @Override
 public void onNothingSelected(AdapterView<?> arg0) {
 // TODO Auto-generated method stub
 spinnerScale.setSelection(defaultSpinnerScaleSelection);
 curScale = floatScale[defaultSpinnerScaleSelection];
 }};
}

my manifest file is as follow

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.example.Android"
 android:versionCode="1"
 android:versionName="1.0" >
 <uses-sdk android:minSdkVersion="8" />
 <application
 android:icon="@drawable/ic_launcher"
 android:label="@string/app_name" >
 <activity
 android:name=".AndroidBitmapActivity"
 android:label="@string/app_name" >
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />
 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>
 </application>
</manifest>

my console is showing following thing

[2012年03月29日 13:23:00 - AndroidBitmap] Android Launch!
[2012年03月29日 13:23:00 - AndroidBitmap] adb is running normally.
[2012年03月29日 13:23:00 - AndroidBitmap] Performing com.example.Android.AndroidBitmapActivity activity launch
[2012年03月29日 13:23:00 - AndroidBitmap] Automatic Target Mode: using existing emulator 'emulator-5554' running compatible AVD 'A2.2'
[2012年03月29日 13:23:00 - AndroidBitmap] WARNING: Unknown device API version!
[2012年03月29日 13:23:00 - AndroidBitmap] Uploading AndroidBitmap.apk onto device 'emulator-5554'
[2012年03月29日 13:23:00 - AndroidBitmap] Installing AndroidBitmap.apk...
[2012年03月29日 13:23:00 - AndroidBitmap] Success!
[2012年03月29日 13:23:00 - AndroidBitmap] Starting activity com.example.Android.AndroidBitmapActivity on device emulator-5554

Answer 1

At a guess I would say you haven't declared the AndroidBitmapActivity in your AndroidManifest.xml file, but I think it would be helpful if you posted more of the stacktrace (and possibly the Manifest file too).

• NotACleverMan: Hmmm. Ok it seems to not be the manifest then. Could you post the entire stack trace so I have a line reference and specific exception to help you with?
• Ashishsingh: you means stack trace on the console.
• NotACleverMan: Is there any more output? There's no force close in that log
• Ashishsingh: there is no force to close it is not opening the activity only
• NotACleverMan: Oh ok. Sorry, I didn't notice you edited the comment that said "it is closing the application forcely". Has the emulator loaded and the OS is running?

Answer 2

Are you trying to access the SD Card?

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

• Vikas Singh: You will need permissions in Manifest if you are trying to access the SDCard... bitmap = BitmapFactory.decodeFile(imageInSD)

Answer 3

it should have a problem with your SD card (if not created then create it first )and i think you haven't a image "er.PNG" in your SD card(if same name image is not in your sd card it will never run) first check out it properly and let try...