1.这部分是显示跳转到另一个Activity，这个被跳转的Activ叫做SecondActivity
写法一：
Intent intent = new Intent(this,SecondActivity.class);
intent.putExtra("account",accountText);
intent.putExtra("password",passwordText);
startActivity(intent);
写法二：
ComponentName componentName = new ComponentName("this","SecondActivity.class");
intent.setComponent(componentName);
startActivity(intent);
它其实也就是：
Intent intent = new Intent();
String packageName = this.getPackageName();
String name = SecondActivity.class.getName();
intent.setClassName(packageName,name);
intent.putExtra("account",accountText);
intent.putExtra("password",passwordText);
startActivity(intent);
2.这部分是隐式跳转到另一个Activity
Intent intent = new Intent();
intent.setAction("com.example.LOGIN_INFO");
intent.addCategory("android.intent.category.DEFAULT");
intent.putExtra("account",accountText);
intent.putExtra("password",passwordText);
startActivity(intent);
接受类SecondActivity代码：
Intent intent=getIntent();
String account = intent.getStringExtra("account");
String password = intent.getStringExtra("password");
TextView info = findViewById(R.id.info);
info.setText("your name is "+account+",your password is "+password+"");
3.接收端返回结果
发送代码：，模拟话费充值，从MainActivity充值到PayActivity
private static final int PAY_REQUEST_CODE=1;
//按mInoput充值按钮
private void initListener() {
mInput.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this,PayActivity.class);
startActivityForResult(intent,PAY_REQUEST_CODE);
}
});
}
接收代码：PayActivity
mInput.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent();
intent.putExtra("resultContent","充值取消");
setResult(3,intent);
}
});
mInput.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent();
intent.putExtra("resultContent","充值成功");
setResult(2,intent);
}
});
返回结果代码：使用onActivityResult方法接受返回结果信息
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode==PAY_REQUEST_CODE){
String resultContent = null;
if(resultCode==2){
resultContent=data.getStringExtra("resultContent");
}else if(resultCode==3){
resultContent=data.getStringExtra("resultcontent");
}
mPayResultText.setText(resultContent);//给TextView控件设置充值结果信息
}
}
原文：https://www.cnblogs.com/wcyMiracle/p/13379182.html