我正在尝试调试我的课程项目。然而，大部分工作都是有效的，我的检查数据和快速保存按钮（意外停止）。我在调试会话中的一个错误是无法打开堆栈跟踪文件。那是什么意思？我查看了一些有关该主题的旧问题，并为我的清单添加了权限。我的代码已附上。当我尝试点击这些按钮时，试图弄清楚为什么我没有发生..（检查数据）和（保存）...也许如果有人可以运行代码并在手机上查看。我真的处于停止点......项目附加...下面，Main，CheckData，SaveData，Data Manipulator java文件......和xml文件 谢谢，...非常感谢任何建议...
Main.java
package com.terrellmcqueen.databaseproject5;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
public class Main extends Activity implements OnClickListener {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
View button1Click = findViewById(R.id.button1);
button1Click.setOnClickListener(this);
View button2Click = findViewById(R.id.button2);
button2Click.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.button1:
Intent i = new Intent(this, SaveData.class);
startActivity(i);
break;
case R.id.button2:
Intent i1 = new Intent(this, CheckData.class);
startActivity(i1);
break;
}
}
}
CheckData.java
package com.terrellmcqueen.databaseproject5;
import java.util.ArrayList;
import java.util.List;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class CheckData extends ListActivity {
TextView selection;
public int idToModify;
DataManipulator dm;
List<String[]> list = new ArrayList<String[]>();
List<String[]> names2 =null ;
String[] stg1;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.check);
dm = new DataManipulator(this);
names2 = dm.selectAll();
stg1=new String[names2.size()];
int x=0;
String stg;
for (String[] name : names2) {
stg = name[1]+" – "+name[2]+ " – "+name[3]+" – "+name[4];
stg1[x]=stg;
x++;
}
ArrayAdapter<String> adapter = new ArrayAdapter<String> ( this, andoid.R.layout.simple_list_item_1,stg1);
this.setListAdapter(adapter);
selection=(TextView)findViewById(R.id.selection);
}
public void onListItemClick(ListView parent, View v, int position, long id) {
selection.setText(stg1[position]);
}
}
SaveData.java
package com.terrellmcqueen.databaseproject5;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.TextView;
public class SaveData extends Activity implements OnClickListener {
private static final int REQUEST_BARCODE = 0;
private TextView mbarcodeEdit;
private DataManipulator dh;
static final int DIALOG_ID = 0;
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.save);
mbarcodeEdit = (EditText) findViewById(R.id.mbarCodeEdit);
View scan = findViewById(R.id.Scan1);
scan.setOnClickListener(this);
View add = findViewById(R.id.Button01add);
add.setOnClickListener(this);
View home = findViewById(R.id.Button01home);
home.setOnClickListener(this);
}
public void onClick(View v){
switch(v.getId()){
case R.id.Scan1:
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE", "SCAN_MODE");
startActivityForResult(intent, REQUEST_BARCODE);
/** public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == REQUEST_BARCODE) {
if (resultCode == RESULT_OK) {
String barcode = intent.getStringExtra("SCAN_RESULT");
mbarcodeEdit.setText(barcode);
} else if (resultCode == RESULT_CANCELED) {
finish();
}
}
};*/
// public void onClick1(View v) {
// switch(v.getId()){
break;
case R.id.Button01home:
Intent i = new Intent(this, SaveData.class);
startActivity(i);
break;
case R.id.Button01add:
View editText1 = (EditText) findViewById(R.id.mbarCodeEdit);
View editText2 = (EditText) findViewById(R.id.assetType);
View editText3 = (EditText) findViewById(R.id.description);
View editText4 = (EditText) findViewById(R.id.Make);
String myEditText1=((TextView) editText1).getText().toString();
String myEditText2=((TextView) editText2).getText().toString();
String myEditText3=((TextView) editText3).getText().toString();
String myEditText4=((TextView) editText4).getText().toString();
this.dh = new DataManipulator(this);
this.dh.insert(myEditText1,myEditText2,myEditText3,myEditText4);
showDialog(DIALOG_ID);
break;
};
}
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == REQUEST_BARCODE) {
if (resultCode == RESULT_OK) {
String barcode = intent.getStringExtra("SCAN_RESULT");
mbarcodeEdit.setText(barcode);
} else if (resultCode == RESULT_CANCELED) {
finish();
}
}
};
protected final Dialog onCreateDialog(final int id) {
Dialog dialog = null;
switch(id) {
case DIALOG_ID:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Information saved successfully !
Add Another Info?").setCancelable(false).setPositiveButton
("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
SaveData.this.finish();
}
}).setNegativeButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
dialog = alert;
break;
default:
}
return dialog;
}
}`
DataManipulator.java
package com.terrellmcqueen.databaseproject5;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteStatement;
public class DataManipulator
{
private static final String DATABASE_NAME = "mydatabase.db";
private static final int DATABASE_VERSION = 1;
static final String TABLE_NAME = "newtable";
private static Context context;
static SQLiteDatabase db;
private SQLiteStatement insertStmt;
private static final String
INSERT = "insert
into " + TABLE_NAME + " (barcode,type,description,make) values (?,?,?,?)";
public DataManipulator(Context context) {
DataManipulator.context = context;
OpenHelper openHelper = new OpenHelper(DataManipulator.context);
DataManipulator.db = openHelper.getWritableDatabase();
this.insertStmt = DataManipulator.db.compileStatement(INSERT);
}
public long insert(String barcode,String type,String description,String make) {
this.insertStmt.bindString(1, barcode);
this.insertStmt.bindString(2, type);
this.insertStmt.bindString(3, description);
this.insertStmt.bindString(4, make);
return this.insertStmt.executeInsert();
}
public void deleteAll() {
db.delete(TABLE_NAME, null, null);
}
public List<String[]> selectAll()
{
List<String[]> list = new ArrayList<String[]>();
Cursor cursor = db.query(TABLE_NAME,
new String[] { "id","barcode","type","description","make" },
null, null, null, null, "name asc");
int x=0;
if (cursor.moveToFirst()) {
do {
String[] b1=new
String[] {cursor.getString(0),cursor.getString(1),cursor.getString(2),
cursor.getString(3),cursor.getString(4)};
list.add(b1);
x=x+1;
} while (cursor.moveToNext());
}
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
cursor.close();
return list;
}
public void delete(int rowId) {
db.delete(TABLE_NAME, null, null);
}
private static class OpenHelper extends SQLiteOpenHelper {
OpenHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE " + TABLE_NAME + " (id INTEGER
PRIMARY KEY, barcode INTEGER, tpye TEXT, description TEXT, make TEXT)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
}
}
Main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="DataBase Sample App"
android:textSize="24.5sp" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/text"
android:layout_marginLeft="34dp"
android:layout_marginTop="74dp"
android:text="Check Data" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button2"
android:layout_alignBottom="@+id/button2"
android:layout_alignRight="@+id/text"
android:text="Save Data" />
</RelativeLayout>
Save.xml
<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/LinearLayout01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingLeft="20sp" >
<TextView
android:id="@+id/button1_label"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_marginBottom="25dip"
android:text="Asset Information Form"
android:textSize="15.5sp" />
<Button
android:id="@+id/Scan1"
android:layout_width="142dp"
android:layout_height="wrap_content"
android:text="Scanner" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="BarCode:"
android:textSize="14.5sp" />
<EditText
android:id="@+id/mbarCodeEdit"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Asset_Type:"
android:textSize="14.5sp" />
<EditText
android:id="@+id/assetType"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Asset Description:"
android:textSize="14.5sp" />
<EditText
android:id="@+id/description"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Make/Model:"
android:textSize="14.5sp" />
<EditText
android:id="@+id/Make"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<LinearLayout
android:id="@+id/LinearLayout02"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2.22"
android:orientation="horizontal"
android:paddingLeft="20sp" >
<Button
android:id="@+id/Button01add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20sp"
android:layout_marginTop="20sp"
android:text="Save" />
<Button
android:id="@+id/Button01home"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20sp"
android:layout_marginTop="20sp"
android:text="Back" />
</LinearLayout>
</LinearLayout>
Check.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:id="@+id/selection2" android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="BarCode – Asset Type – Description- Make/Model" />
<TextView android:id="@+id/selection" android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<ListView android:id="@android:id/list" android:layout_width="fill_parent"
android:layout_height="fill_parent" android:drawSelectorOnTop="false"
android:textSize="3dip" />
</LinearLayout>
Manifest file
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.terrellmcqueen.databaseproject5"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.Main" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:label="@string/app_name" android:name=".CheckData" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<activity android:label="@string/app_name"
android:name=".DataManipulator" />
<activity android:label="@string/app_name" android:name=".SaveData" />
</application>
</manifest>