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POjava substring raising an exception
 

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    <p>So i want to extract few characters from a string and then display it on Textview like this:</p> <pre><code> Uri uri = Uri.parse("content://sms/inbox"); Cursor crsr = getContentResolver().query(uri, null, null, null, null); startManagingCursor(crsr); String[] columns = new String[] { "address", "person", "date", "body", "type" }; String address = ""; String msg = ""; ArrayList&lt;String&gt; conversations = new ArrayList&lt;String&gt;(); if (crsr.getCount() &gt; 0) { while (crsr.moveToNext()) { address = crsr.getString(crsr.getColumnIndex(columns[0])); msg = crsr.getString(crsr.getColumnIndex(columns[3])); msg = msg.substring(1, 30) + "..."; // THIS CAUSES FATAL ERROR conversations.add(address + "\n\n" + msg); } } </code></pre> <p>It is pretty simple to use <code>substring</code> but i can't get why it is giving error and showing fatal errors, here is trace:</p> <pre><code>E/AndroidRuntime(14023): FATAL EXCEPTION: main E/AndroidRuntime(14023): java.lang.RuntimeException: Unable to start activity...... E/AndroidRuntime(14023): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2313) E/AndroidRuntime(14023): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2365) E/AndroidRuntime(14023): at android.app.ActivityThread.access$600(ActivityThread.java:156) E/AndroidRuntime(14023): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) E/AndroidRuntime(14023): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime(14023): at android.os.Looper.loop(Looper.java:153) E/AndroidRuntime(14023): at android.app.ActivityThread.main(ActivityThread.java:5336) E/AndroidRuntime(14023): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime(14023): at java.lang.reflect.Method.invoke(Method.java:511) E/AndroidRuntime(14023): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833) E/AndroidRuntime(14023): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) E/AndroidRuntime(14023): at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:112) E/AndroidRuntime(14023): at dalvik.system.NativeStart.main(Native Method) E/AndroidRuntime(14023): Caused by: java.lang.StringIndexOutOfBoundsException: length=8; regionStart=1; regionLength=29 E/AndroidRuntime(14023): at java.lang.String.startEndAndLength(String.java:583) E/AndroidRuntime(14023): at java.lang.String.substring(String.java:1464) E/AndroidRuntime(14023): at com.sarfraznawaz.cleansms.MainActivity.onCreate(MainActivity.java:41) E/AndroidRuntime(14023): at android.app.Activity.performCreate(Activity.java:5122) E/AndroidRuntime(14023): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1081) E/AndroidRuntime(14023): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2277) </code></pre> <p>Can anyone tell what's wrong with the line?</p> <pre><code>msg = msg.substring(1, 30) + "..."; </code></pre> <p>Thanks</p>
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    1. USpeter.petrov
    1. USDev01
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    2. VO
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    3. VO
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    1. CO`StringIndexOutOfBoundsException: length=8; regionStart=1; regionLength=29`
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    2. COWithout checking the string length why are you performing substring operation??
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      1. USkalyan pvs
    3. CO@kalyanpvs: Because it is `LOGIC` error :p
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      1. USDev01
 

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