一、基礎知識:
1.一個Intent對象包含了一組信息:
1. Component name 指定啟動的Activity
2. Action 要做什麼
3. Data 傳送數據
4. Category
5. Extras 鍵值對
6. Flags
2.Intent基本用法:
[java] view plaincopyprint?// 生成一個Intent對象
Intent intent = new Intent();
intent.putExtra("testIntent", "123"); // 傳遞數據
intent.setClass(Activity_02.this, OtherActivity.class); // 指定跳向哪一個Activity(第二個參數)
//Activity_02.this.startActivity(intent);
startActivity(intent);
// 生成一個Intent對象
Intent intent = new Intent();
intent.putExtra("testIntent", "123"); // 傳遞數據
intent.setClass(Activity_02.this, OtherActivity.class); // 指定跳向哪一個Activity(第二個參數)
//Activity_02.this.startActivity(intent);
startActivity(intent);
[java]
// 接收Intent傳過來的數據
Intent intent = getIntent();
String value = intent.getStringExtra("testIntent"); // 接收Intent的數據
myTextView = (TextView)findViewById(R.id.myTextView);
//myTextView.setText(R.string.other);
myTextView.setText(value);
// 接收Intent傳過來的數據
Intent intent = getIntent();
String value = intent.getStringExtra("testIntent"); // 接收Intent的數據
myTextView = (TextView)findViewById(R.id.myTextView);
//myTextView.setText(R.string.other);
myTextView.setText(value);
3.按鈕事件的注冊:
[java]
private Button myButton = null;
myButton = (Button)findViewById(R.id.myButton);
myButton.setOnClickListener(new MyButtonListener());
class MyButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// 生成一個Intent對象
Intent intent = new Intent();
intent.putExtra("testIntent", "123"); // 傳遞數據
intent.setClass(Activity_02.this, OtherActivity.class); // 指定跳向哪一個Activity(第二個參
數)
//Activity_02.this.startActivity(intent);
startActivity(intent);
/*
Uri uri = Uri.parse("smsto:0800000123");
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
intent.putExtra("sms_body", "The SMS text");
startActivity(intent);
*/
}
}
private Button myButton = null;
myButton = (Button)findViewById(R.id.myButton);
myButton.setOnClickListener(new MyButtonListener());
class MyButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// 生成一個Intent對象
Intent intent = new Intent();
intent.putExtra("testIntent", "123"); // 傳遞數據
intent.setClass(Activity_02.this, OtherActivity.class); // 指定跳向哪一個Activity(第二個參
數)
//Activity_02.this.startActivity(intent);
startActivity(intent);
/*
Uri uri = Uri.parse("smsto:0800000123");
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
intent.putExtra("sms_body", "The SMS text");
startActivity(intent);
*/
}
}
二、代碼展示:
1."Activity_02srcyanactivity_02Activity_02.java"
[java]
package yan.activity_02;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Activity_02 extends Activity {
private Button myButton = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_02);
myButton = (Button)findViewById(R.id.myButton);
myButton.setOnClickListener(new MyButtonListener());
}
class MyButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// 生成一個Intent對象
Intent intent = new Intent();
intent.putExtra("testIntent", "123");
intent.setClass(Activity_02.this, OtherActivity.class);
//Activity_02.this.startActivity(intent);
startActivity(intent);
/*
Uri uri = Uri.parse("smsto:0800000123");
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
intent.putExtra("sms_body", "The SMS text");
startActivity(intent);
*/
}
}
}
package yan.activity_02;
import android.net.Uri;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Activity_02 extends Activity {
private Button myButton = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_02);
myButton = (Button)findViewById(R.id.myButton);
myButton.setOnClickListener(new MyButtonListener());
}
class MyButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// 生成一個Intent對象
Intent intent = new Intent();
intent.putExtra("testIntent", "123");
intent.setClass(Activity_02.this, OtherActivity.class);
//Activity_02.this.startActivity(intent);
startActivity(intent);
/*
Uri uri = Uri.parse("smsto:0800000123");
Intent intent = new Intent(Intent.ACTION_SENDTO, uri);
intent.putExtra("sms_body", "The SMS text");
startActivity(intent);
*/
}
}
}
2."Activity_02srcyanactivity_02OtherActivity.java"
[java]
package yan.activity_02;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class OtherActivity extends Activity{
private TextView myTextView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.other);
Intent intent = getIntent();
String value = intent.getStringExtra("testIntent");
myTextView = (TextView)findViewById(R.id.myTextView);
//myTextView.setText(R.string.other);
myTextView.setText(value);
}
}
package yan.activity_02;