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我的數據庫名稱是AppDB.db，表名是Scrip，其中包含3列_id和符號& company_name，它們是文本。 我已將數據庫複製到資產文件夾中。無法從sqlite獲取數據android
當應用程序運行時，首先檢查數據按鈕出現，點擊它，應用程序停止。 我不知道可能是什麼原因。 請幫助..
DatabaseSample.class：
package com.app.DatabaseSample;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class DatabaseSample extends Activity implements OnClickListener {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btncheck = (Button) findViewById(R.id.btncheck);
btncheck.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Intent i = new Intent(this, CheckData.class);
startActivity(i);
}
}
CheckData.class：
package com.app.DatabaseSample;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.TextView;
public class CheckData extends ListActivity {
TextView selection;
DataManipulator dm;
private static final String TAG = "CheckData";
List<String[]> list = new ArrayList<String[]>();
List<String[]> symbol2 = null;
String[] list1;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try {
setContentView(R.layout.check);
dm = new DataManipulator(this);
// dm.createNewDatabase();
dm.open();
symbol2 = dm.selectAll();
dm.close();
list1 = new String[symbol2.size()];
int x = 0;
String stg;
for (String[] symbol : symbol2) {
stg = symbol[1];// + " –-> " + symbol[1];
list1[x] = stg;
x++;
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, list1);
this.setListAdapter(adapter);
selection = (TextView) findViewById(R.id.selection);
} catch (Exception e) {
Log.e(TAG, "Exception in check class...");
}
}
// public void onListItemClick(ListView parent, View v, int position, long
// id) {
// selection.setText(list1[position]);
// }
}
DataManipulator.class：
package com.app.DatabaseSample;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DataManipulator extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "AppDB";
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_PATH = "/data/data/com.app.DatabaseSample/databases/";
private static final String TAG = "DbManipulator";
static final String TABLE_NAME = "Scrip";
private Context context;
SQLiteDatabase db;
DataManipulator dmDB;
public DataManipulator(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
this.context = context;
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE IF NOT EXISTS Scrip(_id integer primary key autoincrement,"
+ "symbol text,company_name text);");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
public DataManipulator open() {
dmDB = new DataManipulator(context);
db = dmDB.getWritableDatabase();
return this;
}
public void close() {
dmDB.close();
}
/*
* public void createNewDatabase() { InputStream assetsDB = null; try {
* assetsDB = context.getAssets().open(DATABASE_NAME); OutputStream dbOut =
* new FileOutputStream(DATABASE_PATH + DATABASE_NAME);
*
* byte[] buffer = new byte[1024]; int length; while ((length =
* assetsDB.read(buffer)) > 0) { dbOut.write(buffer, 0, length); }
*
* dbOut.flush(); dbOut.close(); assetsDB.close(); Log.i(TAG,
* "New database created..."); } catch (IOException e) { Log.e(TAG,
* "Could not create new database..."); e.printStackTrace(); } }
*/
public List<String[]> selectAll() {
List<String[]> list = new ArrayList<String[]>();
// Cursor cursor = db
// .query(TABLE_NAME, new String[] {"symbol", "company_name" }, null,
// null, null, null, null);
try {
Cursor cursor = db.rawQuery(
"select symbol,company_name from Scrip", new String[] {
"symbol", "company_name" });
int x = 0;
if (cursor.moveToFirst()) {
do {
String[] b1 = new String[] {
cursor.getString(cursor.getColumnIndex("symbol")),
cursor.getString(cursor
.getColumnIndex("company_name")) };
list.add(b1);
Log.e(TAG, "selectAll method Error");
x = x + 1;
} while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
cursor.close();
} catch (SQLException e) {
Log.e("selectAll method Error", e.toString());
e.printStackTrace();
}
return list;
}
}
LOG CAT
11-24 17:43:52.535: A/NetworkStats(88): problem reading network stats
11-24 17:43:52.535: A/NetworkStats(88): java.lang.IllegalStateException: problem parsing line: null
11-24 17:43:52.535: A/NetworkStats(88): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:313)
11-24 17:43:52.535: A/NetworkStats(88): at com.android.server.NetworkManagementService.getNetworkStatsUidDetail(NetworkManagementService.java:1223)
11-24 17:43:52.535: A/NetworkStats(88): at com.android.server.net.NetworkStatsService.performPollLocked(NetworkStatsService.java:810)
11-24 17:43:52.535: A/NetworkStats(88): at com.android.server.net.NetworkStatsService.updateIfacesLocked(NetworkStatsService.java:721)
11-24 17:43:52.535: A/NetworkStats(88): at com.android.server.net.NetworkStatsService.updateIfaces(NetworkStatsService.java:699)
11-24 17:43:52.535: A/NetworkStats(88): at com.android.server.net.NetworkStatsService.access$000(NetworkStatsService.java:128)
11-24 17:43:52.535: A/NetworkStats(88): at com.android.server.net.NetworkStatsService$8.handleMessage(NetworkStatsService.java:1546)
11-24 17:43:52.535: A/NetworkStats(88): at android.os.Handler.dispatchMessage(Handler.java:95)
11-24 17:43:52.535: A/NetworkStats(88): at android.os.Looper.loop(Looper.java:137)
11-24 17:43:52.535: A/NetworkStats(88): at android.os.HandlerThread.run(HandlerThread.java:60)
11-24 17:43:52.535: A/NetworkStats(88): Caused by: java.io.FileNotFoundException: /proc/net/xt_qtaguid/stats: open failed: ENOENT (No such file or directory)
11-24 17:43:52.535: A/NetworkStats(88): at libcore.io.IoBridge.open(IoBridge.java:406)
11-24 17:43:52.535: A/NetworkStats(88): at java.io.FileInputStream.<init>(FileInputStream.java:78)
11-24 17:43:52.535: A/NetworkStats(88): at java.io.FileReader.<init>(FileReader.java:42)
11-24 17:43:52.535: A/NetworkStats(88): at com.android.internal.net.NetworkStatsFactory.readNetworkStatsDetail(NetworkStatsFactory.java:272)
11-24 17:43:52.535: A/NetworkStats(88): ... 9 more
11-24 17:43:52.535: A/NetworkStats(88): Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
11-24 17:43:52.535: A/NetworkStats(88): at libcore.io.Posix.open(Native Method)
11-24 17:43:52.535: A/NetworkStats(88): at libcore.io.BlockGuardOs.open(BlockGuardOs.java:98)
11-24 17:43:52.535: A/NetworkStats(88): at libcore.io.IoBridge.open(IoBridge.java:390)
11-24 17:43:52.535: A/NetworkStats(88): ... 12 more
11-24 17:44:00.085: E/ActivityManager(88): ANR in system
11-24 17:44:00.085: E/ActivityManager(88): Reason: Broadcast of Intent { act=android.intent.action.BOOT_COMPLETED flg=0x10 cmp=android/com.android.server.BootReceiver }
11-24 17:44:00.085: E/ActivityManager(88): Load: 4.62/1.5/0.53
11-24 17:44:00.085: E/ActivityManager(88): CPU usage from 3420ms to -4642ms ago:
11-24 17:44:00.085: E/ActivityManager(88): 31% 88/system_server: 19% user + 12% kernel/faults: 2796 minor 2 major
11-24 17:44:00.085: E/ActivityManager(88): 19% 34/surfaceflinger: 17% user + 1.5% kernel/faults: 1 minor
11-24 17:44:00.085: E/ActivityManager(88): 14% 349/com.android.launcher: 12% user + 2.5% kernel/faults: 2385 minor
11-24 17:44:00.085: E/ActivityManager(88): 11% 199/com.android.systemui: 9% user + 2.9% kernel/faults: 2953 minor
11-24 17:44:00.085: E/ActivityManager(88): 9.8% 283/android.process.acore: 6.6% user + 3.1% kernel/faults: 1630 minor 1 major
11-24 17:44:00.085: E/ActivityManager(88): 3.5% 64/bootanimation: 3.4% user + 0.1% kernel
11-24 17:44:00.085: E/ActivityManager(88): 1.1% 43/adbd: 0.6% user + 0.5% kernel
11-24 17:44:00.085: E/ActivityManager(88): 1% 226/com.android.phone: 0.3% user + 0.6% kernel/faults: 53 minor
11-24 17:44:00.085: E/ActivityManager(88): 0.1% 35/zygote: 0% user + 0.1% kernel/faults: 75 minor
11-24 17:44:00.085: E/ActivityManager(88): 0.3% 87/logcat: 0% user + 0.3% kernel
11-24 17:44:00.085: E/ActivityManager(88): +0% 411/com.android.deskclock: 0% user + 0% kernel
11-24 17:44:00.085: E/ActivityManager(88): 100% TOTAL: 74% user + 25% kernel + 0.1% irq
11-24 17:44:00.085: E/ActivityManager(88): CPU usage from 3713ms to 4380ms later:
11-24 17:44:00.085: E/ActivityManager(88): 53% 199/com.android.systemui: 32% user + 20% kernel/faults: 2625 minor
11-24 17:44:00.085: E/ActivityManager(88): 40% 199/ndroid.systemui: 23% user + 17% kernel
11-24 17:44:00.085: E/ActivityManager(88): 10% 201/GC: 7.8% user + 3.1% kernel
11-24 17:44:00.085: E/ActivityManager(88): 18% 34/surfaceflinger: 15% user + 3% kernel
11-24 17:44:00.085: E/ActivityManager(88): 16% 61/SurfaceFlinger: 16% user + 0% kernel
11-24 17:44:00.085: E/ActivityManager(88): 1.5% 34/surfaceflinger: 1.5% user + 0% kernel
11-24 17:44:00.085: E/ActivityManager(88): 1.5% 266/Binder Thread #: 0% user + 1.5% kernel
11-24 17:44:00.085: E/ActivityManager(88): 16% 88/system_server: 10% user + 6% kernel/faults: 63 minor
11-24 17:44:00.085: E/ActivityManager(88): 9% 103/ActivityManager: 7.5% user + 1.5% kernel
11-24 17:44:00.085: E/ActivityManager(88): 4.5% 95/Compiler: 1.5% user + 3% kernel
11-24 17:44:00.085: E/ActivityManager(88): 3% 100/Binder Thread #: 3% user + 0% kernel
11-24 17:44:00.085: E/ActivityManager(88): 1.5% 106/PackageManager: 0% user + 1.5% kernel
11-24 17:44:00.085: E/ActivityManager(88): 1.5% 281/Binder Thread #: 1.5% user + 0% kernel
11-24 17:44:00.085: E/ActivityManager(88): 4.5% 64/bootanimation: 4.5% user + 0% kernel
11-24 17:44:00.085: E/ActivityManager(88): 6% 66/BootAnimation: 6% user + 0% kernel
11-24 17:44:00.085: E/ActivityManager(88): 3% 43/adbd: 1.5% user + 1.5% kernel
11-24 17:44:00.085: E/ActivityManager(88): 1.5% 43/adbd: 0% user + 1.5% kernel
11-24 17:44:00.085: E/ActivityManager(88): 0.4% 87/logcat: 0% user + 0.4% kernel
11-24 17:44:00.085: E/ActivityManager(88): 1.6% 283/android.process.acore: 0% user + 1.6% kernel/faults: 7 minor
11-24 17:44:00.085: E/ActivityManager(88): 1.6% 290/Compiler: 0% user + 1.6% kernel
11-24 17:44:00.085: E/ActivityManager(88): 100% TOTAL: 67% user + 32% kernel
您可以至少向我們展示logcat消息。 –
請在這裏發佈你的logcat。 – Hiral
@Jan＆Hiral - 整個logcat？其實我新的android和不知道logcat – GAMA