[英]How i insert intent method to this code for when click button it will show second activity
Here is the java activity that provide to add data for record in SQLite. 以下是为SQLite中的记录添加数据而提供的java活动。 My question is how i insert some code for when clicking button and it will show second activity.
我的问题是如何在单击按钮时插入一些代码,它将显示第二个活动。 i don't know where i should insert.
我不知道应该在哪里插入。 And don't know what the code should be.
并且不知道代码应该是什么。 please help me.
请帮我。
import java.sql.PreparedStatement;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
public class AddStudent extends Activity {
DatabaseStudent mHelper;
SQLiteDatabase mDb;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add);
mHelper = new DatabaseStudent(this);
mDb = mHelper.getWritableDatabase();
final EditText editName = (EditText)findViewById(R.id.editName);
final EditText editLastName = (EditText)findViewById(R.id.editLastName);
ImageView buttonAdd = (ImageView)findViewById(R.id.imageAdd);
buttonAdd.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
String name = editName.getText().toString();
String lastname = editLastName.getText().toString();
String condition = getIntent().getStringExtra("Condition");
double school = getIntent().getDoubleExtra("Intent", 0);
//Date&Time
java.util.Date dt = new java.util.Date();
java.text.SimpleDateFormat sdf =
new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentTime = sdf.format(dt);
if(name.length() != 0 && lastname.length() != 0
) {//&& school.length() != 0
Cursor mCursor = mDb.rawQuery("SELECT * FROM "
+ DatabaseStudent.TABLE_NAME + " WHERE "
+ DatabaseStudent.COL_NAME + "='" + name + "'"
+ " AND " + DatabaseStudent.COL_LASTNAME + "='"
+ lastname + "'" + " AND "
+ DatabaseStudent.COL_SCHOOL + "='" + school //add COL_SCHOOL = currentTime
+ "'"+ " AND " + DatabaseStudent.COL_TIME + "='" + currentTime
+ "'"+ " AND " + DatabaseStudent.COL_CON + "='" + condition
+ "'", null);
if(mCursor.getCount() == 0) {
mDb.execSQL("INSERT INTO " + DatabaseStudent.TABLE_NAME
+ " (" + DatabaseStudent.COL_NAME
+ ", " + DatabaseStudent.COL_LASTNAME
+ ", " + DatabaseStudent.COL_SCHOOL
+ ", " + DatabaseStudent.COL_TIME
+ ", " + DatabaseStudent.COL_CON
+ ") VALUES ('" + name + "', '" + lastname
+ "', '" + school + "', '" + currentTime + "', '" + condition + "');");
editName.setText("");
editLastName.setText("");
Toast.makeText(getApplicationContext()
, "Already added"
, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getApplicationContext()
, "This data is exist"
, Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getApplicationContext()
, "Please fill in the blank"
, Toast.LENGTH_SHORT).show();
}
}
});
}
public void onStop() {
super.onStop();
mHelper.close();
mDb.close();
}
} }
You'd want to insert any code you want executed when you hit a button in the onClick method, which you have as seen here: 当您点击onClick方法中的按钮时,您想要插入要执行的任何代码,如下所示:
buttonAdd.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// do stuff when buttonAdd is clicked
}
});
Now you can use intents inside the onClick method to begin a second activity, like so: 现在,您可以在onClick方法中使用意图来开始第二个活动,如下所示:
buttonAdd.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(current_activity.this, second_activity.class);
startActivity(intent);
}
});
You can consult the following for more details: http://developer.android.com/training/basics/firstapp/starting-activity.html 有关更多详细信息,请参阅以下内容: http : //developer.android.com/training/basics/firstapp/starting-activity.html
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